The Collaborative International Dictionary
Trochilidist
Trochilidist \Tro*chil"i*dist\, n. [See Trochilus.]
One who studies, or is versed in, the nature and habits of
humming birds, or the Trochilid[ae].
--Gould.
Wiktionary
trochilidist
n. One who studies, or is versed in, the nature and habits of hummingbirds.