The Life of Birds: Evolution and Diversity of Birds

Birds evolved from reptiles around 225 million years ago, with Protoavis as an early intermediary. Archaeopteryx, the oldest known bird with feathers, lived 150 million years ago. Modern birds retain some reptilian traits and inhabit diverse environments. There are nearly 9,000 bird species, classified into orders like Passeriformes, Piciformes, Charadriiformes, Falconiformes, and Anseriformes.

Which fossil is considered an intermediary between reptiles and birds?

• Pterodactyl

• Protoavis

• Tyrannosaurus

• Archaeopteryx

What is a notable feature that modern birds have retained from their reptilian ancestors?

• Scales on their legs

• Feathers

• Wings

• Beaks

Approximately how many bird species are known today?

• 15,000

• 1,000

• 5,000

• 9,000

Which order of birds includes eagles and falcons?

• Falconiformes

• Anseriformes

• Piciformes

• Passeriformes

Which order of birds is known for including songbirds?

• Falconiformes

• Anseriformes

• Charadriiformes

• Passeriformes