Q: Our veterinarian describes our cockatiel as a "chronic egg layer." Is this serious? What should we do? A: Chronic egg laying in pet birds is becoming increasingly common especially in ...

Birds that changed their nesting habits laid eggs around 25 days prematurely, on average. The team studied egg collections from the Field Museum in Chicago, the Western Foundation of Vertebrate ...

By comparing century-old eggs preserved in museum collections to modern observations, scientists were able to determine that about a third of the bird species nesting in Chicago have are laying ...

Killdeer eggs take about 24 days to hatch, so this youngster must have come from an egg laid at the beginning of April. That’s roughly one month earlier than birds were laying eggs a century ago ...

Climate change is causing some species of birds to lay their eggs a month earlier than normal. A study recently published in the Journal of Animal Ecology reports that roughly a third of all bird ...

When Mary Caswell Stoddard started measuring bird eggs from hundreds of species, she wasn’t expecting to learn that most eggs are not egg-shaped. Think about an egg and you’ll probably conjure ...