Caleb Foster
Monkeys, like humans, have nails instead of claws. While monkeys don't get manicures, they do have methods for keeping their nails trimmed, such as biting them or waiting for them to grow long and break off. Some monkeys don't mind having long nails, just as some humans prefer to grow out their nails. Chimpanzees, a type of monkey, usually bite their nails, but some let them grow. Nails provide protection and stability and are advantageous for holding and grasping objects, which may explain why they continue to grow.
| Characteristics | Values |
|---|---|
| Do monkey's nails grow? | Yes, monkey nails grow continuously. |
| How do monkeys trim their nails? | Monkeys trim their nails by biting them or waiting for them to grow long and break off on their own. |
| Why do monkeys have nails instead of claws? | Nails provide protection, stability, and increased dexterity for tool use. |
| Do all monkeys have nails? | No, some species like lemurs, lorises, and galagos have nails on most digits and grooming claws on their second toes. |
| Is nail-biting unique to humans? | No, nail-biting is also observed in other primates like chimpanzees and is an inherited trait called onychophagia. |
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What You'll Learn
Methods to keep nails trimmed
Monkeys and other primates have been observed using various methods to keep their nails trimmed, including biting them or simply waiting for them to grow long and break off on their own. While nail biting is common among primates, it is considered abnormal behaviour in humans. Instead, humans employ various methods to keep their nails trimmed, some of which are listed below:
Soften the Nails
The best time to trim your nails is immediately after taking a bath or shower when the nails are softer and easier to cut. You can also soak your nails in warm water for a few minutes before cutting them.
Use Appropriate Tools
It is recommended to use nail clippers or nail scissors designed specifically for fingernails or toenails. Avoid using sharp cutting tools like knives, razor blades, or regular scissors, as they may slip and injure the skin around the nail.
Cut Nails Straight Across
To prevent ingrown toenails, cut your nails straight across, leaving the corners intact. Cutting nails into a "V" shape or rounding off the edges should be avoided.
File the Nails
After cutting your nails, use a nail file or emery board to smooth out and shape the nail. File the nail gently in one direction, from the side to the centre, to avoid weakening the nail.
Moisturise the Nails
Moisturising the nails after trimming helps keep them flexible and prevents them from becoming dry, brittle, and prone to splitting.
Practice Good Hygiene
Regularly clean under your nails to prevent the build-up of dirt and bacteria, which can lead to infections and split nails. Wash and scrub under your nails every time you wash your hands or bathe, and remember to clean your nail clippers after each use.
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Nail-biting
Like humans, monkeys and apes are primates with flat nails on their fingers and toes. Unlike humans, some monkeys and apes, such as chimpanzees, prefer to bite their nails to keep them trimmed. Others simply wait for their nails to grow too long and break off on their own. There is no definitive habit that unites non-human primates when it comes to nail grooming, as it is a matter of personal preference.
The behavior of nail-biting can have negative consequences, as it can damage the teeth and gums, increase the risk of infection, and even impact self-esteem and social interactions. It is important to note that nail-biting can also spread germs and increase the risk of getting sick. Additionally, it can be challenging to break the habit, and it may require behavioral therapy or other forms of treatment.
To prevent nail-biting, it is essential to identify the triggers and develop strategies to manage stress or anxiety. Keeping the nails trimmed and well-maintained can also help reduce the urge to bite them. Finding alternative ways to occupy the hands and mouth, such as chewing gum or squeezing a stress ball, can be effective. In more severe cases, behavioral therapy can help address the underlying causes and provide techniques to stop nail-biting.
Overall, while nail-biting is a common habit, it is important to be mindful of its potential negative impacts. By understanding the triggers and seeking appropriate support, individuals can develop healthier habits and reduce the risk of associated health risks.
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Nails breaking off
Monkeys and other primates have been observed using various methods to keep their nails trimmed. Some bite their nails, while others simply wait for their nails to grow too long and break off on their own. Chimpanzees, for example, usually bite their nails, but some prefer to leave them alone. If their nails are not kept trimmed, they will likely break off.
Nail breakage in humans can be caused by various factors, including age, environmental factors, nutritional deficiencies, underlying health conditions, and nail care habits. Age-related nail breakage is due to the decrease in nail strength that occurs over time, making nails more susceptible to breaking. Environmental factors, such as frequent exposure to water, hot and dry environments, or harsh chemicals, can also contribute to nail breakage by stripping moisture from the nails.
Nutritional deficiencies, such as a lack of biotin, zinc, iron, or vitamin D, can further weaken nails, making them more prone to breaking. Additionally, underlying health conditions, such as thyroid disorders, anemia, psoriasis, eczema, and fungal infections, can also increase the susceptibility of nails to breakage.
Certain nail care habits can also lead to nail breakage. For example, frequent use of nail polish, extensions, and acetone-based removers can weaken and dry out nails, making them more prone to breaking. Nail biting and picking are also detrimental habits that can weaken nails over time.
To prevent nail breakage, it is essential to maintain a consistent nail care routine. This includes regular moisturizing, limiting the use of nail polish and acetone-based products, and avoiding nail biting and picking. Additionally, addressing any underlying health conditions or nutritional deficiencies can help strengthen nails and reduce breakage.
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Ancient primates with claws
Unlike other mammals, humans and other primates have nails instead of claws. However, fossil evidence suggests that ancient primates had claws in addition to nails. These claws were used for grooming and offer clues about the daily behaviour of our earliest ancestors.
In 2013, Doug Boyer of the University of California Museum of Paleontology discovered several curious primate fossils. These fossils, known as distal phalanges, are the bones at the tips of fingers and toes. The shape of these bones can indicate whether they support a claw or a nail. Distal phalanges topped with a claw are narrow and tapered, while those supporting a nail are flat and wide. The fossils discovered by Boyer resembled those of animals with grooming claws.
Further evidence for ancient primates having claws comes from fossils found in Bighorn Basin, Wyoming. Jonathan Bloch, the Florida Museum of Natural History curator of vertebrate paleontology at the University of Florida, discovered what appeared to be a "strange, narrow nail" bone. However, when compared to modern primates, it resembled a tarsier grooming claw. The bone was smaller than a grain of rice and matched the proportions of Teilhardina brandti, a mouse-sized, tree-dwelling primate.
Bloch and Boyer co-authored a 2011 study describing the first fossil evidence of nails in Teilhardina brandti. However, the discovery of grooming claws at three independent sites spanning 10 million years in the fossil record suggested that early primates had grooming claws in addition to nails. This finding overturns the previous assumption that the earliest primates had nails on all their digits.
The transition from claws to nails in primates is still not fully understood. Bloch and Boyer propose that the change may have coincided with the evolution of primate movement, including climbing, leaping, and grasping. Nails may have been more practical than claws, which could snag or get in the way. Additionally, the social structure of primates may have influenced the shift, as grooming plays an important role in maintaining the health and hygiene of primate coats.
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Advantages of nails for primates
Primates are unique among mammals for having nails instead of claws. While the transition from claws to nails remains a mystery, scientists suspect that nails aid in locomotion. Claws would have provided an excellent grip for larger-bodied primates climbing large tree trunks, but nails and broader fingertips are better for grasping smaller branches in tree canopies. Nails may also be a side effect of losing claws, rather than an adaptation.
Another theory for the transition from claws to nails is that nails are linked to increased social grooming. Primates with complex social networks may have lost their grooming claws because they were less reliant on self-grooming. For example, solitary monkey species such as titi and owl monkeys have re-evolved a grooming claw, possibly because they do not have the same level of social support for grooming.
Nails also have advantages in terms of hygiene. Thick body hair can be a haven for ticks, lice, and other parasites, and having nails instead of claws may have helped early primates remove these pests.
Finally, nails may simply be a matter of personal preference for primates. Some primates bite their nails, while others leave them alone, allowing them to grow long and break off on their own. This behaviour varies across different species of primates, with no one definitive habit that unites all non-human primates.
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Frequently asked questions
Yes, monkeys' nails grow continuously.
Monkeys have been observed using a variety of methods to keep their nails trimmed, including biting them or waiting for them to grow too long and break off on their own. Some monkeys, like the titi and owl monkeys, have evolved a grooming claw that they may use for this purpose.
Nails provide monkeys with increased dexterity and stability, making it easier for them to grasp objects and use tools.
