TED-Ed: Gillian Gibb: Why can't some birds fly?

The video explores the world of flightless birds, highlighting their habitats, evolution, and survival strategies. It explains how some birds have lost the ability to fly due to energy conservation and lack of predators, while others have adapted to survive alongside predators. The video also discusses the threats posed by human-introduced predators and the adaptations that help some flightless birds thrive.

Which bird is known for its defensive use of razor-sharp toe claws?

• Emu

• Penguin

• Cassowary

• Ostrich

What is a primary reason some birds have evolved to be flightless?

• To increase their body size

• To conserve energy

• To improve their swimming ability

• To enhance their mating rituals

What environmental change often threatens flightless birds on islands?

• Introduction of new predators

• Climate change

• Lack of food resources

• Increased competition from other birds

How have large flightless birds like emus and ostriches adapted to survive alongside predators?

• By living in dense forests

• By developing the ability to fly short distances

• By forming large flocks for protection

• By growing larger and becoming fast runners

What is one way flightless birds use their wings despite not flying?

• For catching prey

• For digging

• For steering while running

• For climbing trees