None that is healthy and properly nourished.
Look in a bird book and look for the shell.
Platypus eggs are soft and leathery, rather than hard-shelled.
A male bird!
the white bird
Frog eggs are typically laid in clusters, have a jelly-like outer covering, and are fertilized externally. Bird eggs are usually laid individually, have a hard calcium carbonate shell, and are fertilized internally before laying.
Yes, they will eat bird eggs and any kind of nestling bird.
A clutch generally refers to a bird and its eggs or chicks.
Snake eggs have flexible, leathery shells instead of hard ones like bird eggs. This allows the eggs to be more pliable and conform to the shape of the nest, making them easier to lay in tight spaces. The soft shells also make it easier for hatchlings to push their way out when they are ready to emerge.
Reptile eggs are soft-shelled so that the babies can break out of the shells. Bird eggs are hard-shelled, because baby birds use their beaks to crack the shells of their eggs, but since reptiles don't have beaks to use to break their shells, their eggs have to be soft-shelled.
They are kind of like eggs. But they are more gooey and soft.
They have a soft shell - which is porous to allow oxygen and moisture to penetrate into the developing embryo.
A white-breasted Nuthatch might be the bird you're looking for.