How parasitic cuckoos lay host-matching eggs while remaining a single species

European cuckoos lay very different eggs depending on the host species. Genetic analyses have revealed how this adaptation is ...
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Bird species once only found in captivity lays first wild eggs in 40 years

The birds were eliminated when the invasive brown treesnake was accidentally introduced to the island of Guam in the '40s.
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Kalahari weaver birds lay bigger eggs when they have female helpers to feed nestlings

Pablo Capilla-Lasheras has received funding from the Biotechnology and Biological Sciences Research Council (UK) and currently works at the University of Glasgow. Tswalu Kalahari Reserve is a ...

From Ostrich to crocodiles: 5 animals that lay massive eggs

Eggs are among nature’s most fascinating progenating creations, varying widely in size and shape across the animal kingdom. They represent the earliest stage of life for many creatures, from tiny ...