Proboscis Monkey Quiz

It may seem hard to believe, but male proboscis monkeys use their fleshy, pendulous noses to attract mates. Scientists think these outsize organs create an echo chamber that amplifies the monkey’s call, impressing females and intimidating rival males.

Habitat and Behavior

Proboscis monkeys are endemic to the jungles of Borneo, never straying far from the island’s rivers, coastal mangroves, and swamps. They are a highly arboreal species and will venture onto land only occasionally to search for food. They live in organized harem groups consisting of a dominant male and two to seven females and their offspring. Various groups often congregate near water at night to sleep. Swimming Abilities

Proboscis monkeys are the primate world’s most prolific swimmers, frequently leaping from tree limbs and hitting the water with a comical belly flop. They’ve evolved webbed feet and hands to help them outpace the crocodiles that are some of their main predators.

Size and Appearance

Among the largest of Asia’s monkeys, male proboscis specimens can reach 50 pounds, although females attain only about half that size. Adults wear a coat of light brown fur that turns red around the head and shoulders and gray at the arms, legs, and tail. Only males develop the namesake nose.

Diet

Proboscis monkeys survive mainly on a diet of leaves, seeds, and unripe fruits but will occasionally consume insects as well. They have complex, chambered stomachs that rely on a host of symbiotic bacteria for digestion.

Threats to Survival

Unfortunately, Borneo’s most threatened landscapes are home to these highly specialized primates. The rampant clearing of the region’s rain forests for timber, settlement, and oil palm plantations has depleted huge tracts of their habitat. The fragmentation of the monkeys' range means they are being forced to descend from the trees more frequently and often must travel perilously long distances to find food. Their land predators include jaguars and some native peoples who consider proboscis monkeys a delicacy.

Over the last 40 years, proboscis monkey populations have plummeted. They are currently protected from hunting or capture in Borneo.

What is the common name of the monkey discussed in the text?

• Rhesus Monkey

• Proboscis Monkey

• Capuchin Monkey

• Spider Monkey

Tags

CCSS.RI.4.5

CCSS.RI.5.5

CCSS.RI.6.5

CCSS.RI.7.5

CCSS.RI.8.5

Where are proboscis monkeys endemic to?

• Amazon Rainforest

• Sahara Desert

• Madagascar

• Borneo

What is the main diet of proboscis monkeys?

• Leaves, seeds, and unripe fruits

• Insects

• Meat

• Fish

What is the group name for proboscis monkeys?

• Herd

• Pack

• Harem

• Flock

What is the IUCN Red List Status of proboscis monkeys?

• Critically Endangered

• Least Concern

• Endangered

• Extinct

What is the size range of male proboscis monkeys?

• 10 to 15 inches

• 16 to 20 inches

• 24 to 28 inches

• 30 to 35 inches

What is the weight range of male proboscis monkeys?

• Up to 40 pounds

• Up to 50 pounds

• Up to 30 pounds

• Up to 20 pounds

What is the main habitat of proboscis monkeys?

• Savanna

• Rainforest

• Tundra

• Desert

What is the main threat to the survival of proboscis monkeys?

• Hunting

• Climate Change

• Pollution

• Disease

What is the swimming ability of proboscis monkeys?

• Can swim but not well

• Most prolific swimmers

• Can swim short distances

• Cannot swim