Scavenging and Ecosystem Interactions

Casey Anderson, a wildlife filmmaker, explores the Montana wilderness, following ravens and magpies to a site where a grizzly bear is scavenging on dead bison. He explains the annual bison crossing, where some fall through the ice, providing food for scavengers like birds, coyotes, and bears. The video highlights the importance of scavenging as an adaptation for survival in harsh winter climates, emphasizing the interconnectedness of the ecosystem.

What is Casey Anderson's profession?

• Park Ranger

• Biologist

• Wildlife Filmmaker

• Wildlife Photographer

Why do ravens and magpies attract Casey's attention?

• They are endangered species.

• They are noisy.

• They lead him to wildlife action.

• They are rare birds.

What natural event causes bison to become trapped in the river?

• Heavy snowfall

• Ice melting

• River flooding

• Bison migration

Which animals are typically the first to find bison carcasses?

• Bears

• Birds

• Coyotes

• Wolves

What is the primary activity of predators in this ecosystem?

• Fishing

• Scavenging

• Foraging

• Hunting

How do coyotes manage to get food despite being lower on the food chain?

• By scavenging opportunistically

• By hunting in packs

• By stealing from bears

• By fishing in the river

What advantage do coyotes have over birds when scavenging?

• They can chase off birds.

• They can fly.

• They are larger.

• They are faster.

Why is scavenging considered an effective adaptation in winter?

• It requires less energy than hunting.

• It is more exciting than hunting.

• It is safer than hunting.

• It is a social activity.

What is the main benefit of bison carcasses for scavengers?

• They provide shelter.

• They offer a social gathering point.

• They supply essential energy.

• They are a source of water.

Which animal is mentioned as waiting to cross the river?

• A wolf

• A bald eagle

• A coyote

• A grizzly bear