Nestling development and aging of Arizona Grasshopper Sparrow

Arizona Birds
By:  and 



We studied breeding Arizona Grasshopper Sparrow (Ammodramus savannarum ammolegus) status and distribution, natural and life history, habitat use, and nest survival from 2004 through 2014 in southeastern Arizona. In this paper we present descriptions and photographs of known-age nestlings that will assist field biologists to identify Arizona Grasshopper Sparrow nestlings to species, more accurately age them for nest survival studies, and conduct more detailed nestling development studies. Our observations of developing characteristics included: eyes, ears, skin, down, major feather tracts, bill, rictal flange and gape colors and patterns, and behavior. More field data collection is required to supplement our information and to determine how broadly applicable this information is to other Grasshopper Sparrow subspecies.

Publication type Article
Publication Subtype Journal Article
Title Nestling development and aging of Arizona Grasshopper Sparrow
Series title Arizona Birds
Volume 2018
Year Published 2018
Language English
Publisher Arizona Field Ornithologists
Contributing office(s) Fort Collins Science Center
Description 13 p.
First page 1
Last page 13
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