Which type feather has nerve endings in it?
Which type of feather covers the outside of the body?
How many chambers are in a bird's heart?
Which order of reptiles is the most closely related to the birds?
What type of baby bird is dependant on the parent at birth?
What type of bird mates with more than one female in a single season?
True or false: Birds are oviparous.
The strongest types of muscles in a bird are those used for...
What is the covering of feathers on a bird called?
What type of feather provides insulation?