Avian Anatomy

3. this is a common foot condition for birds if they have underling health issues or abnormal surfaces/perching.
7. birds can control the constriction and dilation of this to adjust their sight focus.
9. this is an often fatal, notifiable and contagious disease.
12. birds expel waste, reproduce and lay eggs through this part of the body.
13. this item helps food to be ground up by the gizzard and is essential for many species of birds.
15. some birds have specialised reproductive organs. Ducks have _____ shaped genitalia.
16. this bone is attached to the sternum and acts as an anchor during flight or swimming.
17. bird species which involve the male looking different to the female are sexually ______.

1. birds do not have these in their mouths.
2. most birds do not have a sense of ______.
4. birds can see this on the colour spectrum, humans cannot.
5. birds do not just have lungs but also ______ for efficient respiration.
6. this is the organ that grinds up food.
8. bird faeces usually have a white element to their faeces. This is their _____.
10. birds tend to use sand, dirt or snow instead of water to do this.
11. feathers, beaks, nails/claws are all made of ______.
14. most birds which are capable of flight have pneumatic / _____ bones.
15. this is the organ food is stored in first after leaving the oesphagus.