The genus
Sayornis is a small group of medium-sized insect-eating birds, known as
phoebes, in the tyrant flycatcher family Tyrannidae. The genus name
Sayornis is constructed from the specific part of Charles Lucien Bonaparte's name for Say's phoebe,
Muscicapa saya, and Ancient Greek
ornis, "bird". The English
Phoebe is a name for the Roman moon-goddess Diana.
(Wikipedia)