Olive-sided Flycatcher Migration & Breeding
The Olive-sided Flycatcher (Contopus cooperi) is a migratory landbird in steep decline. An estimated 78% population loss of this species has occurred in North America over the past 40 years. Our research seeks to reduce Olive-sided Flycatcher decline in Alaska and propose management solutions for recovery. There are two notable ways in which decline may occur:
Adults undertake one of the longest migratory journeys of any North American songbird. Adult mortality during migration likely exacerbates decline, as this species has one of the lowest reproductive rates of any North American songbird. Using cutting-edge technology (tags weighing <1gram) we have documented the first-ever migratory route of this species. Alaska breeders exhibit a remarkable ~20,500 km (12,700 mile) annual journey! This knowledge enables Alaska to work with other managers in the U.S. and internationally to identify and maintain habitat at important stops along the way. This ensure adults successfully return to nest in Alaska, some from as far south as Bolivia!
Our studies revealed that Alaska exhibits one of the highest known rates of nest success for this species in North America. Approximately 75% of Alaska nests rear one or more chicks, compared to ~53% of nests in the Pacific Northwest. We have increased existing knowledge of Alaska nests by revealing characteristics associated with nest success and survival (e.g. habitat features, insect diet). The data will inform strategies to conserve or enhance breeding areas to restore populations.
Click on the link below to learn more about the biology and identification: www.allaboutbirds.org/guide/Olive-sided_Flycatcher/id
Olive-sided Flycatcher Audio from ADFG