Breeding Collecting Eggs Primates 
10,000 Birds
FEBRUARY 18, 2014
The vast majority of the 10,000+ living species of birds are passerines, and the vast majority of those have a similar system of breeding: Mom and dad bird make a nest and share parental responsibilities roughly equally, if not identically. …because cooperative breeding facilitates defense against brood parasites.
10,000 Birds
JULY 21, 2011
The clifftop habitats along rocky shores of the North Atlantic (on both sides of the pond) abound in bird biomass during breeding bouts, for instance. There are probably other major trends that depend, for example, on latitude and timing. When Albatross alight in temporal alignment anything else is swamped out.
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