What do you know about birds?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Birds are , which means they reproduce by laying eggs; their mouths are beaks or bills. Birds with their lungs.
Their skin is covered with .
Depending on the food they eat, they can be herbivorous... ... or omnivorous.