@article {423,
	title = {Daylength and the hummingbirds{\textquoteright} use of time},
	journal = {Auk},
	volume = {92},
	year = {1975},
	note = {Trochilidae},
	pages = {81-97},
	keywords = {yesnest},
	author = {Calder, W.A.}
}
