Birds

Birds evolved from dinosaurs during the Jurassic period, developing lightweight, feathered bodies over millions of years. They use colorful feathers for mating displays and territorial dominance, while some, like the red-winged blackbird, can hide their colors to avoid predators. Birds have three eyelids for eye protection. Owls, with tube-shaped eyes fixed by bones, rotate their heads to see around.

During which geological period did birds first evolve from dinosaurs?

• Triassic

• Jurassic

• Cretaceous

• Permian

What is one reason birds have bright and colorful feathers?

• To blend in with their environment

• To attract mates

• To regulate body temperature

• To scare away predators

How do some birds like the red-winged blackbird protect themselves from predators?

• By flying at high speeds

• By mimicking predator sounds

• By hiding in dense foliage

• By covering their bright patches

What is the function of the nictitating membrane in birds?

• To protect the eye and keep it moist

• To help in hunting prey

• To improve depth perception

• To enhance vision in low light

Why can't owls move their eyes like most animals?

• Their eyes are shaped like tubes

• Their eyes are too sensitive to light

• Their eyes are too small

• Their eyes are covered by feathers