What Colors Can Cats See
|

What Colors Can Cats See? Unveiling the Feline Color Palette

Welcome to our fascinating exploration of the world of cat vision and color perception. Have you ever wondered what colors cats can see? What Colors Can Cats See and how does their visual experience differ from ours? In this article, we will uncover the secrets of feline eyesight and reveal the unique color palette that cats perceive.

Contrary to popular belief, cats can indeed see colors, although their color vision is distinct from humans. What Colors Can Cats See? To understand this, we need to delve into the intricacies of their visual system. Cats possess two types of color receptors, called cones, which are most sensitive to blue and yellow wavelengths of light. As a result, cats perceive shades of blue and yellow more easily than other colors, giving their world a more muted color spectrum.

Let’s embark on this exciting journey and gain a deeper understanding of how cats perceive colors, what Colors Can Cats See, how their eyes work, and the fascinating aspects of their visual perception. Unlocking the mysteries of cat color vision will not only broaden our knowledge but also strengthen the bond between cat lovers and their feline companions.

Core Insights:

  • Cats have color vision, but their color perception differs from humans.
  • Cats’ color vision is most sensitive to blue and yellow wavelengths of light.
  • The cat color spectrum appears more muted compared to the vibrant colors humans see.
  • Cats’ visual system is specialized for movement detection and low-light conditions.
  • Selecting toys for cats’ color vision should prioritize movement and interactive play.

How Do Cats’ Eyes Work?

Cats have fascinating and unique eyes that contribute to their remarkable sensory abilities. Understanding how cats’ eyes work can shed light on their color perception and overall vision.

Cats’ eyes contain two types of photoreceptor cells called rods and cones. Rods are responsible for low-light vision and peripheral vision, allowing cats to see in dimly lit environments and detect movement in their surroundings. On the other hand, cones are responsible for color vision.

Compared to humans, cats have fewer cones in their eyes, which limits their color perception. The cones in their eyes are most sensitive to blue and yellow light wavelengths, making these colors more distinguishable to them. As a result, cats see shades of blue and yellow more clearly than other colors. However, their color spectrum is narrower compared to humans, whose three types of cones enable them to perceive a wider range of colors.

Cats’ color vision spectrum, primarily focused on blue and yellow, affects how they perceive the world around them. While they may not see colors as vividly or vibrantly as humans do, their unique visual abilities still allow them to navigate and interact with their environment effectively.

The Role of Rods and Cones in Cat Vision

Rods and cones play distinct roles in cats’ vision. Rods, which are more concentrated towards the outer edges of their retinas, enable cats to see clearly in low light conditions and have enhanced peripheral vision. This adaptation is essential for their hunting instincts and survival.

Cones, located more centrally in cats’ retinas, are responsible for color vision. Cats have two types of cones: one that is most sensitive to blue light and another that is most sensitive to yellow light. This makes cats particularly adept at perceiving shades of blue and yellow in their environment.

Cats’ eyes have evolved to prioritize night vision and motion detection, which are crucial for their predatory instincts. Their color vision, while limited, still serves them well in navigating their surroundings.

A Comparison of Cat and Human Color Perception

Cats’ color perception differs significantly from humans due to the variation in the number and sensitivity of their color receptors. Humans have three types of cones that allow them to see a broad range of colors across the visible spectrum.

In contrast, cats have fewer cones, limiting their color perception to shades of blue and yellow. They have reduced sensitivity to colors like red, green, and other vibrant shades. While they may be unable to appreciate the full spectrum of colors, cats possess remarkable visual capabilities tailored for their natural instincts and environment.

What Colors Can Cats See

The Cat Vision Spectrum

It’s important to note that cats’ visual spectrum focuses primarily on shades of blue and yellow. Understanding their color preferences helps in selecting toys and engaging with them effectively.

Colors Perceived by CatsColors Challenging for Cats to Perceive
Shades of BlueRed
Shades of YellowOrange
Shades of GreenBrown

As the table shows, cats can perceive varying shades of blue, yellow, and green more easily than other colors. However, colors like red, orange, and brown may appear less distinguishable to them.

While cats may not see the world in the same vibrant hues as humans, their unique color perception aligns with their evolutionary adaptations and enhances their ability to thrive in their natural environment.

What Colors Can Cats See Best?

Cats have a unique color vision that differs from humans. While we perceive a wide range of colors, cats’ color perception is more limited. They see certain colors more easily than others, and their visual spectrum is primarily focused on shades of blue and yellow.

When it comes to the colors that cats can see best, they have an easier time perceiving varying shades of blue, green, and yellow. These colors stand out more to cats and are more distinguishable in their visual world. On the other hand, cats have difficulty perceiving colors such as red, orange, and brown. These colors appear less vibrant and may blend with their surroundings.

To give you a better understanding of the colors cats can see best, let’s take a look at the following table:

ColorsPerception by Cats
BlueClear and easily distinguishable
GreenReasonably clear, though not as vivid as blue
YellowClear and easily distinguishable
RedDifficult to perceive and appears more muted
OrangeDifficult to perceive and appears more muted
BrownDifficult to perceive and appears more muted

As you can see from the table above, cats’ color perception is not as sharp or vibrant as ours. The colors they see appear more muted and may blend with their surroundings. Their visual spectrum leans towards shades of blue and yellow, making these colors more distinguishable to them.

The Muted Color Palette of Cats

The muted color spectrum perceived by cats is not a limitation but a natural adaptation that serves a purpose. Cats are skilled predators, and this color perception aligns with their hunting instincts. In the wild, animals they prey upon may not be vibrant in color, but they may have distinguishing features or movements that cats can detect.

“Cats’ visual spectrum, which emphasizes shades of blue and yellow, aids in their hunting prowess by allowing them to detect subtle movements and changes in their environment.”

While cats may not see the same vivid hues that we do, their visual capabilities are optimized for their survival and natural behaviors. Understanding their color perception helps us provide a stimulating environment that engages their senses and enriches their lives.

Why Can’t Cats See Red?

Have you ever wondered why cats seem to completely ignore the color red? It’s not just a coincidence – cats’ eyes are not sensitive to red wavelengths of light. Instead, their color-detecting cones are more attuned to blue-violet and yellow-green light. This unique feature of feline vision means that cats are unable to see the color red or distinguish it from other colors.

When you see your cat playfully chasing after a laser pointer or pouncing on a toy with a red hue, it’s important to note that they’re primarily responding to the movement rather than the color itself. While cats may not perceive the vibrant shades of red that we do, they are still able to enjoy interactive play and engage with their surroundings in their own unique way.

how cats perceive colors

Understanding the limitations of cats’ color vision helps us appreciate the fascinating intricacies of their visual perception. While the absence of red from their color palette may seem foreign to us, it doesn’t hinder them from enjoying life and exploring their surroundings. Cats are remarkable creatures with their own sensory experiences, and their ability to navigate the world on their own terms is a true testament to their adaptability and resourcefulness.

How Cats See Colors Compared to Humans

Cats’ color perception differs from humans due to the number of color receptors in their eyes. While humans have three types of color receptors called cones, cats only have two. This fundamental difference means that cats see colors on a more limited spectrum than humans.

Cats primarily rely on their two types of cones, which are most sensitive to blue and yellow wavelengths of light. As a result, cats perceive shades of blue and yellow more easily than other colors. However, their color vision is not as rich or vibrant as human color vision, making the cat color spectrum more muted.

“Cats see the world in their own unique way, with a reduced ability to see red, green, and other vibrant colors compared to humans. Their color vision is best suited for detecting movement and navigating in low light rather than perceiving a wide range of colors.”

This difference in color vision between cats and humans can be attributed to the number and sensitivity of the color receptors in their eyes. While cats have a more limited perception of colors, they compensate for this with their heightened ability to detect movement. This ability is especially useful for cats in their natural hunting instincts and navigating in low-light environments.

What Colors Can Cats See

Does Cat Color Vision Affect Behavior?

Cats’ visual perception is unique, and their color vision plays a role in how they interact with the world around them. While cats may not perceive the same range of colors as humans, their behavior is not significantly impacted by their limited color vision. Cats primarily rely on their ability to detect movement and navigate in low light, which is why their hunting instincts and other senses, such as hearing and smell, are more crucial in influencing their behavior.

Unlike humans who have three types of color receptors (cones), cats have only two. This means that cats see colors on a more limited spectrum, with blue and yellow being the most distinguishable. However, despite their reduced color perception, cats can still engage in hunting behaviors and successfully interact with their environment.

“Cats have an amazing ability to compensate for their limited color vision by relying on their other senses,” explains Dr. Sarah Peterson, a feline behavior specialist. “Their keen sense of hearing helps them locate prey, while their acute sense of smell allows them to detect scents and mark territories. These heightened senses play a much larger role in their behavior than their color vision.”

Therefore, it’s essential to understand that cat behavior is influenced more by factors like instinct, past experiences, and their environment rather than their visual perception. While cats’ color vision may differ from humans’, it does not significantly impact their behavior or their ability to navigate their surroundings.

In fact, cats’ color vision is optimized for their natural hunting instincts, making it easier for them to detect and track movement. Their ability to see subtle changes in light and contrast enables them to spot potential prey more efficiently.

Cats’ behavior is shaped more by their predatory instincts, territoriality, and the need to establish and maintain social bonds rather than their limited color vision. Cats are incredible adapters and have developed sophisticated strategies to thrive in their environments,” says Dr. Peterson.
cat visual perception

Choosing Toys for Cats’ Color Vision

When selecting toys for your feline friend, it’s important to consider their unique color vision. Cats perceive colors differently than humans, with a greater sensitivity to shades of blue and yellow. While these colors may be more visually stimulating to them, it’s essential to remember that cats are primarily attracted to toys that mimic their natural prey and engage their hunting instincts.

While color is a consideration, it is not the sole determining factor when choosing toys for cats. Instead, focus on toys that provide interactive play and encourage physical activity. The movement and texture of the toy are often more important to cats than the color alone. Incorporating different shapes, sizes, and textures can add variety and keep your cat engaged.

“When selecting toys for your cat, it’s crucial to prioritize their instincts and preferences. Focus on toys that allow them to engage in active play, such as toys with feathers or interactive puzzle toys.” – Dr. Sarah Brown, Feline Behavior Specialist

Here are a few toy options that consider both your cat’s color vision and their hunting instincts:

  • Wand toys with feathers: These toys simulate the movement of birds, attracting your cat’s attention and encouraging them to chase and pounce.
  • Interactive puzzle toys: These toys require your cat to use their problem-solving skills to earn treats or rewards, providing mental stimulation and engaging their natural instincts.
  • Ball toys: Toys with bells or treats inside can capture your cat’s interest and encourage them to bat or chase the toy.
  • Scratching posts with attached toys: Combining a scratching surface with dangling toys can provide both a play outlet and a place for your cat to keep their claws healthy.
cat playing with toys

Remember to rotate and introduce new toys regularly to keep your cat’s interest high. Observe their preferences and play style to determine which toys they enjoy the most. Offering a variety of toys that cater to their instincts and color vision will ensure your cat remains mentally stimulated and physically active.

Tips for Choosing the Right Toys:

  • Consider your cat’s preferences: Does your cat prefer toys that move, make noise, or have a specific texture?
  • Choose toys that match your cat’s energy level: Some cats may prefer interactive toys that require more physical activity, while others may enjoy quieter toys they can bat around on their own.
  • Keep safety in mind: Avoid toys with small parts that could be swallowed, and regularly inspect toys for wear and tear.
  • Experiment with different types of toys: Cats have individual preferences, so trying out a variety of toys will help you determine what your cat enjoys most.

By considering your cat’s color vision and natural instincts, you can create an enriching playtime experience that keeps them entertained and engaged.

Cat Night Vision and its Impact on Color Perception

While cats cannot see in complete darkness, their night vision is exceptional compared to humans. Cats have a higher number of rod cells in their eyes, which enable them to see better in low light conditions. Additionally, cats possess a reflective layer called a tapetum, which enhances their vision by amplifying available light, allowing them to navigate more effectively in dim lighting.

However, it’s important to note that cats’ night vision does not improve their ability to perceive colors. Even in low light, their color perception remains limited, making it difficult for them to distinguish different hues. Cats primarily rely on their heightened visual acuity in darkness for hunting and navigating their surroundings, rather than relying on color cues.

The Role of Rod Cells

Rod cells play a crucial role in cats’ night vision. These specialized cells are highly sensitive to light and are responsible for detecting movement and shapes in dimly lit environments. The abundance of rod cells allows cats to detect even the slightest movements, making them skilled predators in the dark.

However, since rod cells are not responsible for color vision, cats’ ability to perceive colors remains limited, regardless of the lighting conditions. Instead, their visual system prioritizes motion detection and spatial awareness, enabling them to efficiently hunt and explore their surroundings at night.

FeatureCats’ VisionHumans’ Vision
Ability to see in low lightExcellentLimited
Color perception in low lightReducedNo significant changes
Motion detectionHighly sensitiveLess sensitive
can cats see in the dark
Cats’ night vision is a remarkable adaptation that allows them to thrive in low light conditions. Their increased number of rod cells and the presence of a tapetum facilitate better visual acuity in darkness. However, despite their impressive night vision, cats’ ability to perceive colors remains limited, even in dim lighting.

Understanding cats’ night vision helps us appreciate their unique sensory abilities and the ways in which they interact with their environment. By providing them with enriching play experiences and toys that cater to their hunting instincts, we can further engage and stimulate their exceptional night vision.

Debunking Myths About Cat Color Perception

When it comes to cats’ color vision, there are many misconceptions that have been perpetuated over time. One common myth is that cats are completely colorblind or see the world in black and white. However, this couldn’t be further from the truth. While cats do have a limited range of color perception, they can still see shades of blue and yellow.

Contrary to popular belief, cats’ visual world is not grayscale. They have a different color perception compared to humans, with a reduced ability to perceive certain colors like red, green, and other vibrant hues. Just because cats’ color vision is different doesn’t mean they only see in black and white.

Understanding the nuances of cat color vision helps debunk these myths and provides a more accurate understanding of how cats perceive their environment. While their color perception may not be as diverse as ours, it is still an important part of their sensory experience.

Myth: Cats see the world in black and white.
Fact: Cats can see shades of blue and yellow, although their color perception is different from humans.

In reality, cats’ color vision is different from ours due to the number of color receptors in their eyes. Humans have three types of color receptors (cones), while cats have only two. This limited color perception means that cats primarily rely on other sensory cues, such as movement and shape, to navigate their surroundings.

Meow-sical Genius: Black & White Guitarist Cat T Shirt

$24.99

Unleash your inner feline music lover with our “Meow-sical Genius: Black & White Guitarist Cat T Shirt”! This unique tee is the purr-fect way to show off your passion for cats and music. Featuring a stunning hand-drawn design of a cat in full song, strumming a guitar, it’s a masterpiece that will capture the hearts…

Myth: Cats are completely colorblind.
Fact: Cats have limited color perception, with a narrower color spectrum focused on blue and yellow.

Common Cat Color Vision Myths

  • Cats can only see in black and white.
  • Cats cannot perceive any colors other than blue and yellow.
  • Cats’ vision is similar to that of dogs, who are known to have poor color perception.
  • Cats’ color vision is the same as humans, but they just have different color preferences.

By dispelling these misconceptions, we gain a better understanding of how cats perceive their world. Cats may see the world in a different palette, but it is still rich and meaningful to them. So the next time you see your cat gazing out the window or playing with a colorful toy, remember that they are experiencing their own unique visual reality.

Debunking Cat Color Vision Myths

MythFact
Cats can only see in black and white.Cats can see shades of blue and yellow.
Cats cannot perceive any colors other than blue and yellow.Cats have a limited ability to perceive other colors, but their vision is focused on blue and yellow.
Cats’ vision is similar to that of dogs, who are known to have poor color perception.Cats’ color vision is different from dogs, and they have a narrower color spectrum compared to humans.
Cats’ color vision is the same as humans, but they just have different color preferences.Cats have fewer color receptors than humans, leading to a different color perception.

It’s fascinating to explore the unique ways in which cats perceive the world around them. While their color vision may not be as extensive as ours, it is an integral part of their sensory experience. By debunking these myths, we can appreciate and better cater to their visual needs when it comes to toys, environments, and interactions.

What Colors Can Cats See

Enhancing Playtime with Cat Color Vision

Understanding cats’ color vision can greatly enhance playtime and create a more engaging experience for your feline companion. Although cats may not see the full range of colors that humans can, they are still attracted to toys that provide visual stimulation and mimic their natural prey. When selecting toys for your cat, consider their color perception and choose toys that are visually appealing to them.

Toys in shades of blue and yellow may be more visible and enticing to cats, as these colors are within their visual spectrum. Cats’ color receptors are most sensitive to blue and yellow wavelengths of light, making these colors stand out to them. You can find a variety of toys in these colors, such as feather teasers, interactive balls, or stuffed mice.

However, it’s important to keep in mind that color alone may not be the sole factor in capturing your cat’s attention. Size, texture, and movement are equally important considerations. Cats are instinctively drawn to toys that resemble their natural prey, so opt for toys that mimic the movements of birds, mice, or insects. Interactive toys that can be batted, pounced upon, or chased are particularly appealing to cats.

Here are a few examples of toys that can enhance playtime for your cat:

ToyDescription
toys for cats' color perceptionA feather teaser with brightly colored feathers that mimic the movement of birds.
toys for cats' color perceptionAn interactive ball with patterns in shades of blue and yellow, encouraging your cat to chase and pounce.
toys for cats' color perceptionA stuffed mouse toy with vibrant colors, providing both visual and tactile stimulation.

By selecting toys that align with your cat’s color perception and natural hunting instincts, you can create a more enriching playtime experience. So, next time you’re looking for toys for your furry friend, remember to consider their color vision and provide toys that engage their senses in a playful and interactive way.

The Fascinating World of Cat Color Perception

Cat color perception is a captivating subject that offers insight into the unique sensory capabilities of our feline friends. While cats see the world differently than humans, their ability to perceive colors in shades of blue, green, and yellow is well-suited for their hunting instincts and survival.

Unlike humans, cats have a more limited color spectrum, but this adaptation allows them to excel in their natural environment. Their vision is finely attuned to detecting subtle movements and variations in contrast, enabling them to stalk prey with precision.

What Colors Can Cats See

Exploring the intricacies of cat color perception deepens our understanding of their sensory experiences. It highlights the remarkable adaptations cats have evolved to thrive in a variety of environments. By delving into the fascinating realm of cat vision, we can form a stronger bond with our feline companions and create a more enriching relationship.

“Cats may not see the world as we do, but their unique color perception enhances their hunting prowess and their ability to navigate their surroundings.”

It’s important to recognize that cats’ color perception is just one aspect of their sensory world. While they may not appreciate the same vibrant hues that we do, their rich sensory palette extends beyond color. Their acute hearing, sensitive whiskers, and keen sense of smell all contribute to their remarkable ability to interact with their environment.

When engaging with your cat, it’s essential to consider their unique perception of color. While they may not distinguish red from other colors as vividly as we do, they are still attracted to toys and stimuli that encourage their natural instincts. Interactive toys that mimic prey, provide mental stimulation, and encourage physical activity will engage your cat’s hunting prowess regardless of color.

Remember, the world through a cat’s eyes is a fascinating and vibrant place. While their color perception may differ from ours, it offers a glimpse into the remarkable adaptations of these incredible animals.

Seeing the World in a Different Light

Cats’ color perception may not be as dynamic as ours, but it is uniquely suited to their evolutionary needs. While cats may not see the world in the same range of colors as humans, their vision is optimized for specific tasks, such as hunting and survival. Understanding this unique aspect of cat vision allows us to appreciate their sensory experiences and deepen our connection with them.

SIGN UP FOR NEWSLETTER

Sign up to receive email updates on new product announcements, gift ideas, special promotions, sales and more.

Final Remarks

In the end, cats’ color vision is unique and differs from humans. While they have a reduced ability to perceive red, green, and other vibrant colors, they compensate for this limitation with their heightened ability to detect movement and navigate in low light. Cats primarily see shades of blue and yellow, which form their color spectrum. Understanding this unique color perception is crucial when selecting toys for cats, as visually stimulating toys in blue and yellow can enhance playtime.

While cats’ color vision may be different from ours, it does not significantly impact their behavior. Cats rely more on their other senses, such as hearing and smell, for navigating and interacting with their environment. However, understanding their color perception and choosing toys that engage their hunting instincts can create a more enjoyable and enriching play experience for cats.

In last, cats’ color vision may be limited, but their unique sensory capabilities make them fascinating creatures. Their ability to see shades of blue and yellow, combined with their exceptional night vision, allows them to thrive in their natural hunting and survival instincts. By understanding and respecting their color perception, we can deepen our bond with cats and provide them with a stimulating and engaging environment.

FAQ

What colors can cats see?

Cats can see colors, but their color vision differs from humans. Cats have two types of color receptors in their eyes called cones, which are most sensitive to blue and yellow wavelengths of light. This means that cats perceive shades of blue and yellow more easily than other colors.

How do cats’ eyes work?

Cats’ eyes have two types of photoreceptor cells called rods and cones. Rods are responsible for low light vision and peripheral vision, while cones are responsible for color vision. Cats have fewer cones than humans, which limits their color perception. Cats’ cones are most sensitive to blue and yellow light, which means they see shades of these colors more clearly than others. They have a narrower color spectrum compared to humans.

What colors can cats see best?

Cats can see varying shades of blue, green, and yellow more easily than other colors. They have difficulty perceiving red, orange, and brown. Cats’ color vision is not as sharp or vibrant as humans’, so the colors they see appear more muted. Their visual spectrum is primarily focused on shades of blue and yellow, making these colors more distinguishable to them.

Why can’t cats see red?

Cats’ color-detecting cones in their eyes are not sensitive to red light wavelengths. They have cones that are more sensitive to blue-violet and yellow-green light. This means that cats cannot see the color red or distinguish it from other colors. When cats appear to be reacting to a laser pointer or similar red light, they are actually responding to the movement rather than the color itself.

How do cats see colors compared to humans?

Cats’ color perception differs from humans due to the number of color receptors in their eyes. Humans have three types of color receptors (cones), while cats have only two. This means that cats see colors on a more limited spectrum than humans. They have a reduced ability to see red, green, and other vibrant colors. Cats’ color vision is best suited for detecting movement and navigating in low light rather than perceiving a wide range of colors.

Does cat color vision affect behavior?

Cats primarily rely on their ability to detect movement and navigate in low light rather than their color vision. While cats may not perceive the same range of colors as humans, their visual capabilities still allow them to engage in hunting behaviors and interact with their environment. Cats’ color vision, or lack thereof, does not significantly impact their behavior as they rely more on their other senses, such as hearing and smell.

What should I consider when choosing toys for cats’ color vision?

When choosing toys for cats, it’s important to consider their color vision. Cats see blue and yellow more easily than other colors, so toys in these colors may be more visually stimulating to them. However, it’s important to note that cats are primarily attracted to toys that move and mimic their natural prey. Color alone may not be the most important factor when selecting toys for cats, but toys that engage their hunting instincts and provide interactive play are ideal.

Can cats see in the dark?

While cats cannot see in complete darkness, they have excellent night vision compared to humans. Cats have more rod cells in their eyes, which allow them to see better in low light conditions. Cats also have a reflective layer called a tapetum, which amplifies available light, giving them better vision in dim lighting. However, their ability to see colors is still limited, even in low light.

What are some misconceptions about cat color perception?

There are common misconceptions about cats’ color vision, such as cats being completely colorblind or seeing the world in black and white. In reality, cats have a limited range of color perception but can still see shades of blue and yellow. Their visual world is not grayscale, but it is different from humans. Understanding the nuances of cat color vision helps debunk these myths and provides a more accurate understanding of how cats perceive their environment.

How can I enhance playtime with my cat’s color vision?

Understanding cats’ color vision can enhance playtime by selecting toys that are visually stimulating to them. While cats may not see the full range of colors that humans can, they are attracted to toys that move, mimic prey, and provide interactive play. Toys in blue and yellow may be more visible and engaging to cats, but it’s important to consider other factors like size, texture, and movement when choosing toys for cats.

What is fascinating about cat color perception?

Cat color perception is a fascinating topic that reveals the unique sensory capabilities of cats. Through their limited color vision, cats perceive the world in shades of blue, green, and yellow. They see the world differently than humans, but their vision is well-suited for their hunting instincts and survival. Exploring cat color perception deepens our understanding of their sensory experiences and strengthens the bond between cats and their owners.

Is there a summary of cat color vision?

Understanding cats’ color vision can enhance playtime, guide toy selection, and deepen our understanding of their sensory experiences. Cats see colors on a limited spectrum, with a focus on blue and yellow. While they cannot see red and other vibrant colors, cats compensate for this with their ability to detect movement and navigate in low light. Their color perception, or lack thereof, does not significantly impact their behavior or overall visual capabilities.

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *