April 29, 2012
Fairy Tern - Gygis alba - Gygis blanche [synmirror 2011]
Gygis alba - Wiki:
This small tern is famous for laying its egg on bare thin branches in a small fork or depression without a nest. This behaviour is unusual for terns, which generally nest on the ground. It is thought that the reason for the absence of nests is the reduction in nest parasites, which in some colonial seabirds can cause the abandonment of an entire colony.
Gygis alba is a long-lived bird, having been recorded living for 17 years.

Fairy Tern - Gygis alba - Gygis blanche [synmirror 2011]

Gygis alba - Wiki:

This small tern is famous for laying its egg on bare thin branches in a small fork or depression without a nest. This behaviour is unusual for terns, which generally nest on the ground. It is thought that the reason for the absence of nests is the reduction in nest parasites, which in some colonial seabirds can cause the abandonment of an entire colony.

Gygis alba is a long-lived bird, having been recorded living for 17 years.