• Welcome to BirdForum, the internet's largest birding community with thousands of members from all over the world. The forums are dedicated to wild birds, birding, binoculars and equipment and all that goes with it.

    Please register for an account to take part in the discussions in the forum, post your pictures in the gallery and more.
ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Bird Biology Quiz (1 Viewer)

If anyone still looks at this thread. here is the next question.

What are the two main theories that determine clutch size?
 
Last edited:
1. Predation Hypothesis (Where threat of predation is great there tends to be a smaller clutch size.)

2. Seasonality Hypothesis (The seasonal availability of food determines clutch size.)
 
Warning! This thread is more than 16 years ago old.
It's likely that no further discussion is required, in which case we recommend starting a new thread. If however you feel your response is required you can still do so.

Users who are viewing this thread

Back
Top