An egg, by definition, has a shell. What you would be asking then is whether birds can lay "yolks", and the answer is no. Sometimes an eggshell is soft rather than hard (in the case of some snakes and other reptiles). As far as I know, birds lay hard eggs.
An owl is a bird. A bird lays eggs. Therefore the owl lays eggs.
No. A chicken is a bird. No marsupial lays eggs.
The Ostrich lays big eggs.
no bird is not mammel as he lays eggs.
The bird lays them.
the cowbird
*Does the swallow bird lay eggs? A characteristic of a bird is that it lays eggs. A Swallow is a bird, therefore it lays eggs.
The Oyster Catcher lays its eggs amongst stones and pebbles.
not many do
hummingbird
No, I is a bird and it lays eggs.
An ostrich.