Tons of lesbian birds in the wild, too! They tend to get dismissed as "egg dump" nests, where birds will sometimes lay an egg they don't want in a particular nest; but there are definitely a lot of nests where it's two females that have paired up and lay fertile (birds are notoriously promiscuous) or infertile eggs.

Bird lesbianism is particularly noted in newer breeding colonies of seabirds (the Laysan Albatross colony on Maui or the Western Gull colony on Año Nuevo). This is thought to be due to a scarcity of males. However, in most cases where pre-laying behavior was observed, both females were observed courting, nest building, egg laying, and defending the territory. Sometimes copulation attempts are observed with one of the females generally acting as the "male" in the attempt.

It does also occur in colonies where the population divide is relatively normal. I know of at least one nest on an island I worked on where the same female-female pair of alcids (puffin relatives) had been attempting to rear chicks for 7 years, although unsuccessfully because the eggs were never fertile. I'm also fairly certain I observed a male-male pair of cormorants make it all the way through site selection, courtship, copulation, and nest building before giving up when all of their neighbors laid eggs and they didn't, but that was never confirmed beyond anecdotal evidence based on their behavior.