L2 Birds

2. Mucus membranes around the eyes should always be pale ____.
6. This is the organ that grinds up food.
8. Some feathers have a _____ supply.
9. Male chickens have these on their legs. They are used to establish dominance.
11. This is where eggs and faeces are passed.
12. These should always be held in when handling a bird.

1. Chickens can have their wings _____. This ensures that they cannot escape enclosures.
3. If chicken coops aren't kept hygienic in the summer months, these inverts can infest chicken legs.
4. This can be given to birds to help with digestion.
5. Birds store food in their _____.
7. Birds often have ____ bones which allow them to be lighter in flight.
9. Birds don't just have lungs, they also have air ___.
10. This kind of lighting can be given to birds to help the body make vitamin D.