SOME time ago I wrote a short letter asking for information about the colours of birds' eggs, which appeared in NATURE of May 14, 1908. I read the answer to my letter in a subsequent number of ...

Common murres, for instance, have particularly pointy and elliptical eggs (see above)—and are expert divers. Perhaps a streamlined bird needs a streamlined egg; stout flightless birds like ...

These features are especially common in this ancient bird lineage, suggesting these traits ... focusing most of their effort on tending eggs before they hatch. Unlike helpless hatchlings which ...

Jonathan Plissner, a supervisory wildlife biologist at Midway Atoll National Wildlife Refuge, told BBC Radio 4 on Wednesday that “it’s very rare” for a bird of Wisdom’s age to lay an egg, ...