Boyd Deep Canyon Desert Research Center

07 May, 05 AM - 10 May, 05 AM

Most studies of avian territorial behavior have focused on male birds during the breeding season; however, some species maintain year-round territories. Females of some species also maintain territories during the breeding season. These territories must serve different functions, which suggest the behaviors used to maintain them will also vary. I propose to investigate territorial behavior, song, and territory size in male Costa?s hummingbird, a non-migratory bird that is common in southern California and maintains year-round territories. I will observe individual males on their territories in a natural and urban habitat, collecting behavioral data, representative songs and measures of territory size. These observations will occur once a month for a year, to look for seasonal changes in territorial behavior. Male song frequency is expected to be highest during the breeding season, and the structure is expected to be less variant during the breeding season. Males are expected to chase and dive more during the breeding season as well. I also predict territory location will remain relatively constant; shifting slightly to stay where a food source is found or a potential mate is present. Further, I will observe females on their territories during the breeding season (Jan-May), collecting behavioral data, descriptions of territories and measures of territory size. I expect females to hold territories that are primarily suited for nesting purposes, and secondarily, close to or including a food source. This work will provide insight into the relationship between the function of territories and the behaviors used to maintain them.

Visit #19657 @Boyd Deep Canyon Desert Research Center

Approved

Under Project # 10086 | Research

Year round territoriality and song in Costa?s hummingbird (Calypte costae)

graduate_student - California State University (CSU), Fullerton

Reservation Members(s)

Krista Brown May 7 - 10, 2010 (4 days)
Krista Brown May 7 - 10, 2010 (4 days)

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Mayhew housing facilities 2 May 7 - 10, 2010