11.   The bird has a small body and long wings.

12.   The bird has rather a shrill cry.

13.   The birds have a distinctive blue band round their eyes.

14.   Both birds had a dark blue crest.

15.   The bird had trouble breathing and was discharging blood from the nostrils.

16.   Most birds have to fly long distances to migrate.

17.   The bird has no distinguishing features.

18.   The bird has a conspicuous red head.

19.   Female birds have a single ovary and they lay calcareous eggs.

20.   Birds also have a complicated system of courtship.