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Into the Nest: What goes in must come out — BBA
Brood parasitism - Wikipedia
Hummingbird appears to have abandoned her nest and two eggs
Facts: Robin Eggs
If the egg of another species of bird ended up in another bird's nest and she has eggs already in, even if the eggs are a lot different, will it know and
NestWatch The Life and Times of Mites - NestWatch
Hitchcock Center for the Environment
Ground-nesting birds defy expectations while avoiding predators
What to Know About Birds Nesting in Your Yard
The Juvenile Stage: What Happens When Baby Birds Leave the Nest?
NestWatch What Should You Do About Ants in Birds' Nests? - NestWatch