There are 15 species of howler monkey and they’re all found in Central and South America.
The howler monkey is the loudest primate on the Earth. Its call – a gruff, resounding roar – can be heard even 3 miles away. You can listen to ithere.
Not just their voice, but the howler monkey’s sense of smell is unbelievably acute – they can smell food from 2 miles away.
Howler monkeys aren’t herbivores, they’re folivores – they are specialists in eating leaves.
Howler monkeys are one of the few primates (including humans), who possess trichromatic colour vision. This means their eyes are sensitive to the three primary colours – green, blue & red – and they can make out the differences between colours. This helps them pick and choose the best (read – the ripest & safest) leaves to eat.
A particular species of howler monkey – the Mantled Howler – uses sticks as tools to drive away intruders and scare away predators. This is extremely unusual to the species as a whole; since this type of tool usage is considered the speciality of higher-order primates like chimps and humans.
Howler monkeys are the second laziest animals of the planet, right after sloths. They spend 80% of their time on treetops just resting. The other 20% of the time? Well, they pee on, poop on and scream at other monkeys, animals and birds.
Howler monkeys are an Endangeredspecies, because of excessive hunting and habitat loss. Save them.
Black Howler Monkey & Baby (Males are completely black in colour, while females are yellowish-white) (Source)
Mantled Howler Monkey – the only known howler monkey to use sticks as tools for defence. (Source)
Midwives have been a part of every culture for centuries. Many places of religious worship celebrate midwifery through paintings, sculptures and Bas reliefs.
Apart from easing the actual birthing process, midwives helped ensure the newborn was healthy, had no trouble breathing and was able to suckle well. In short, midwives ensured both the mother and baby survived. While midwives were the only option for women of yore, today they are one of the most preferred methods of birthing assistance and reproductive care.
When we talk of midwives, we envision a staid, calm person, urging the mother to push, encouraging her with kind words and helping her cope with her pain. When we think about the midwife, we envision a woman and sometimes, a man. Essentially, we envision a human being.
Till as late as the late 1990s, it was believed that the practice of midwifery was developed by people. Surely animals did not, could not, possess a mind so sophisticated, that they could come up with a practice like midwifery. How would they know that another animal needed assistance during birth?
After all, wasn’t the one, defining difference between man and beast, the ability to empathize and help?
Animal midwifery: Where animals help other animals give birth
Nature is magnificent and one of the miracles of nature is an animal that acts as a midwife.
Researchers were stunned to see when male Djungarian hamsters chipped-in to help their mates give birth. Provided they didn’t turn their offspring into a meal first, male Djungarian hamsters consciously pulled the pups out from the females’ birth canals. They proceeded to lick the pups clean and then shared the afterbirth with their mates. If their pups looked asphyxiated, the fathers would lick the amniotic fluid off their nose, clear their airways and help them breathe.
Scientists believe that Djungarian hamster males experience a severe fluctuation in hormones just prior to birth and this results in an increase in cortisol and oestrogen in their bodies. This, they believe, could be one of the reasons for this unusual behaviour. The other theory has to do with the hamsters’ living conditions. Unlike other wild hamster species, Djungarian hamsters live in dry, desert environments and they spend a lot of time in their burrows with their mate, to escape from the harsh climate. This could make them more willing to help their mates during birth (compared to other hamster species where the males are nowhere near the birthing area).
But it isn’t just Djungarian hamsters who make excellent midwives. Researchers have observed female black snub-nosed monkeys in South China also playing midwives to their bandmates during delivery.
When a female black snub-nosed monkey is about to give birth and contractions start, she cries out using a very distinct sound. Upon hearing this sound, another female joins her and waits for the infant to crown. When he does, the midwife gently eases the baby out of the mother’s birth canal, tears open the amniotic sac and hands the infant back to the mother. Once she’s done, the midwife heads back to forage for food or take care of her own infant. The same behaviour was noticed in golden snub-nosed monkeys.
Female bonobos too practice midwifery. This behaviour has been seen often in captivity and once in the wild. Just like the black snub-nosed monkey, the bonobo mother makes a soft, high-pitched squeal.
When she hears this, another female bonobo accompanies the pregnant mother and helps her give birth. Here too, the afterbirth was shared between the mother and the midwife.
Djungarian hamsters aside, both the snub-nosed monkey and bonobo are primates. This makes us wonder whether their primate brains – significantly more developed than other animals’ – could be the reason for midwifery behaviour.
But this may not be the case.
Chimpanzees, who are the closest to humans (and who possess far superior brains compared to bonobos and snub-nosed monkeys), prefer to give birth in isolation. So too other primates like gorillas and orangutans.
But if you consider the research by primatologist Pamela Heidi Douglas, only 5 out of the 39 live births (across 31 primate species) she recorded, were done in isolation. The rest were in the company of band/troopmates.
What makes this behaviour particularly difficult to observe, is how these animals typically give birth at night. Additionally, with these animals so adept at hiding from predators (including humans), it becomes even harder to track birthing animals.
Empathy, intelligence or instinct?
The practice of midwifery developed in humans as we became more aware of the birthing process. Our highly-evolved brains, capable of high empathy, added to this progress.
What we don’t know today, is if animal midwifery stems from the same reason. It could also be the desire to partake of another female’s placenta (after all, it is rich in life-saving nutrients). Or, it could just be pure instinct.
No matter how we reason it, the concept of animals playing midwives will throw up more questions, than they answer. Only time and extensive research will reveal the truth.
They are 98% human! 98% of the Gorilla’s genes are the same as the genes found in humans.
They live only in Africa and no where else in the world.
They make up to 25 different sounds, which is the highest level of vocalization by any great ape after humans. One gorilla named Koko even knew sign language and could make 1000 different signs!
Want to identify a gorilla? Take its nose print. They’re unique (just like human fingerprints).
Homosexuality exists in gorilla families and often females pair together and engage in sexual activity.
Bonus:
When we refer to “Silverbacks”, we mean “male gorillas who’s over the age of 12” and who are often troop leaders. “Blackbacks” are “males under the age of 11”.
Artfully Wild 