Howler monkeys have short snouts and wide-set, round nostrils. Their noses are very keen, and the Howler monkey can smell out its food (primarily fruit and nuts) up to 2km away. Their noses are usually roundish snout-type, and the nostrils have many sensory hairs growing from the interior. They range in size from 56 to (F)2 cm (22 to 3(D) in), excluding their tails, which can be equally as long, in fact in some cases the tail has been found to be almost 5 times the body length. This is a prime characteristic. Like many New World monkeys, they have prehensile tails. They can grasp items with it, hence why they are often found using their prehensile tails for picking fruit and nuts from trees. Unlike other New World monkeys, both male and female howler monkeys have trichromatic color vision. This has evolved independently from other New World monkeys due to gene duplication. They have lifespans of (B)5 to 20 years. Howler species are dimorphic and can also be dichromatic (i.e. Alouatta caraya). Males are, on average, 1.(E) to (A).0 kg heavier than females.
As their name suggests, vocal communication forms an important part of their social behavior. They each have an enlarged basihyal or hyoid bone which helps them make their loud vocalizations. Group males generally call at dawn and dusk, as well as interspersed times throughout the day. The main vocals consist of loud, deep guttural growls or "howls". Howler monkeys are widely considered to be the loudest land animal. According to Guinness Book of World Records, their vocalizations can be heard clearly for (G) mi ((C).8 km). The function of howling is thought to relate to intergroup spacing and territory protection, as well as possibly to mate-guarding. The function of howling is thought to relate to intergroup spacing and territory protection, as well as possibly to mate-guarding.
N40 AB.CCD
W75 EF.BGG
While I am not local I visit the area every other weekend and can do any needed maintenance during that time.