6. Flightless Birds

What is the main reason why flightless birds have evolved?

• To conserve energy

• To escape predators

• To travel long distances

• To hunt for food

Which bird species attacks predators with its razor-sharp toe claws?

• Cassowary

• Emu

• Ostrich

• Kiwi

What happens to the bones of flightless birds?

• They become hollow

• They become dense

• They become fluff

• They shrink

What happens to the wings of flightless birds?

• They grow larger

• They disappear entirely

• They become sturdy

• They turn into fluff

What happens to the flight muscles and keels of flightless birds?

• They shrink

• They become stronger

• They disappear

• They repurpose for swimming

Where do flightless birds often evolve?

• Rainforests

• Savannas

• Islands

• Mountains

What are the main predators of flightless birds on islands?

• Dogs, cats, and rodents

• Humans

• Other flightless birds

• Mammals

Which bird species in New Zealand is threatened by stoats?

• Emu

• Ostrich

• Kiwi

• Takahe

What is the main advantage of flightlessness for birds?

• Ability to fly long distances

• Ability to hunt for food

• Ability to survive on scarce food sources

• Ability to escape predators