Avian Intro

2. When chickens go _____, this means they have the instinctual urge to sit and incubate a clutch of eggs.
3. As birds do not have teeth, they use this organ to grind their food before it moves to the stomach.
5. It takes chickens ____-one days to develop and hatch out when incubated.
6. Most birds lack this sense.
8. The country the call duck originates from.
10. The word for grooming in birds is ____.
11. Birds have a ____ which includes the passageway for faeces/urea, eggs and is the entry to the reproductive system when mating.
14. Black-casqued hornbills are native to ____.
15. Hornbills often like to nest in tree ____.
16. ____ are descendants of the red jungle fowl.
18. This mineral is really important for egg shell production.

1. Birds often need access to this to aid in digestion/breaking down their food.
2. A type of chicken or duck is not called a species or a sub species, but as they are domesticated each is a ______.
4. Adult male hornbills look different to adult females. This is called sexual ______.
7. There are around ___ large breeds of chickens.
8. Most birds' bones have this structure inside.
9. A hornbill's beak is made out of _________
12. Birds don't just have lungs in their respiratory system. They also have ____ ____.
13. The part attached to the top of a hornbill's beak is called a ______.
17. Birds store their food in their ____ before digesting further.