How the North American river otter Lives

Question 1 · multiple choice

Which documentary location is most likely to feature a wild North American river otter?

sunlit tropical coral reefs rivers, lakes, marshes, and coastal waterways open oceans from tropics into surprisingly cold waters tropical mudflats, mangroves, and tidal creeks

Question 2 · multiple choice

Which natural buffet would be most useful to a North American river otter?

small insects and other arthropods mussels, clams, barnacles, and carrion fish, crayfish, frogs, and other aquatic animals flying insects trapped in an orb web

Question 3 · multiple choice

A researcher checks a North American river otter's movement log. Which pattern is most believable?

hunts mainly by day from vegetation hunts mainly from dusk through night often active at dusk or night in hot weather active by day or night depending on season and disturbance

Question 4 · multiple choice

A footprint-and-motion survey follows a North American river otter. Which result is most likely?

swims with body waves, webbed feet, and a steering tail walks slowly, sways, and strikes suddenly with folded forelegs flies slowly and silently before dropping onto prey sidewinds or crawls using waves of muscle along the body

Question 5 · multiple choice

Which adaptation would be most useful to a North American river otter in its normal environment?

an expandable throat pouch scoops fish but does not store them long term closeable ears and nostrils keep water out during dives a long slim snout reduces water resistance during rapid fish strikes the broad head spreads electrical sensors and improves turning control

Question 6 · multiple choice

Which reproductive strategy is used by a North American river otter?

the male balances one egg on his feet beneath a brood pouch females bury eggs in soil after mating pups are born in a sheltered den and taught to swim later many species release eggs into open water with little care

Question 7 · multiple choice

What would a behavioural scientist most likely report about a North American river otter?

mostly solitary but gathers to mate adults meet briefly to mate using scent signals pairs cooperate closely and may gather at fruiting trees may travel alone, in families, or in playful social groups

Question 8 · multiple choice

Why might conservationists monitor a North American river otter as part of a whole ecosystem?

links aquatic food webs and signals healthy connected waterways transfers energy from flying insects to stream food webs prevents some shellfish from monopolising rocky habitat controls flying insects and feeds birds and wasps

Question 9 · multiple choice

Which reaction would be natural for a threatened North American river otter?

closes thick shell valves when disturbed escapes through water, twists quickly, and can bite if trapped dives deeply and relies on size and speed rather than a hard shell dives into a burrow or water and raises fins in threat displays

Question 10 · true false

True or False: A north american river otter a transparent third eyelid works like swimming goggles underwater.

True False