Image: Joe Fuhrman, 2010. [larger view] I encourage you to purchase images from this professional photographer.
NOTE: Please name at least one field mark that supports your identification.
This wide-ranging and stunningly beautiful mystery bird is famous for a unique and astonishing behavior -- what is this behavior?
This small tern is famous for laying its egg on bare thin branches in a small fork or depression of a tree or bush. This balancing act is probably a predator-avoidance behavior as the branches they choose are too small for rats or even small lizards to climb (although I was intrigued by several commenters' observation that this is a way to avoid insect/arachnid nest parasites). White Terns are also quick to relay should they lose the egg in a windstorm. Newly hatched chicks have well developed feet that they use to hang on to their precarious "nest."
Review all mystery birds to date.