The number of eggs a bird lays — its clutch size — varies greatly among species. You might think every species should simply lay lots of eggs because that would increase the odds of more young birds ...

If you were a small-to-medium-sized creature during the ancient Jurassic or Cretaceous periods, you definitely wouldn’t have wanted the shadow of a pterosaur to appear on the ground beneath you. With ...

This is a preview. Log in through your library . Abstract 1. Large clutch size is unambiguously an ancestral state in reptiles. However, females of several lizard lineages lay just one or two eggs per ...

Interpopulation variation in egg size, clutch size and clutch mass was studied 3 years in four populations of painted turtles (Chrysemys picts bellii) from western Nebraska. Body size varied among all ...

The eggs of a bald eagle couple in San Bernardino National Forest have been eaten by ravens, according to the Friends of Big Bear Valley. Jackie and Shadow — for whom thousands of people were rooting ...