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Influence of radio transmitters on prairie falcons (Falco mexicanus)

January 1, 1996

We examined the effects of backpack radio transmitters on Prairie Falcon (Falco mexicanus) reproduction (percentage of occupied territories producing young and number of nestlings produced) over four years. In addition, we observed falcon aeries during brood-rearing to determine attendance at the nest and in the territory, prey delivery rates, and prey composition. We found no effect of radio tagging on Prairie Falcon productivity (nesting success and brood size) among years, although productivity varied significantly among years. The sex of the falcon tagged did not affect productivity. Radio-tagged members of pairs did not differ significantly from un-tagged members of pairs in territory attendance, nest attendance, prey delivery rates, or caching rates. Nestlings raised by radio-tagged parents attained masses similar to those reared by control parents. During low prey years, radio-tagged males brought a greater proportion of small birds and reptiles, and fewer mammals to the nest area than control males.

Publication Year 1996
Title Influence of radio transmitters on prairie falcons (Falco mexicanus)
Authors M.S. Vekasy, J.M. Marzluff, Michael N. Kochert, Robert N. Lehman, Karen Steenhof
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Field Ornithology
Index ID 1015665
Record Source USGS Publications Warehouse
USGS Organization Forest and Rangeland Ecosystem Science Center