Five songbird species in California's oak woodlands each seek out a different habitat to maximize their reproductive success, according to new research in The Auk: Ornithological Advances. The quality ...

Eggshell colouration plays a vital role in avian reproductive strategies by influencing both the thermoregulatory properties and the structural integrity of eggs. Recent studies indicate that ...

CHAMPAIGN, Ill. — A new study reported in the Proceedings of the National Academy of Sciences assessed changes in the reproductive output of 104 bird species around the world between 1970 and 2019.

1. The “heat dissipation limit” theory (HDL) posits that animals with higher capacity to dissipate metabolic heat can increase reproductive investment. This theory remains untested in the wild. 2. We ...

The Condor, Vol. 91, No. 4 (Nov., 1989), pp. 860-867 (8 pages) In a sample of 1,609 marked nests of five species of Ciconiiformes in 21 colonial nesting aggregations in the Everglades, evidence of ...