IBP Needs Your Support!
The Institute for Bird Populations is a California tax-exempt non-profit corporation. We rely upon contributions from people who care about birds to continue and expand our work. Please consider supporting our bird conservation efforts with a tax-deductible contribution, and multiplying the impact of your support by encouraging friends and family to support IBP.
If you would prefer to donate by check, please send your contribution to:
The Institute for Bird Populations
PO Box 1346
11435 S.R.#1, Suite 23
Point Reyes Station, CA 94956
Thank you for your support!
Your donations support important research in avian ecology and conservation. A recent study of Black-headed Grosbeaks was funded largely by contributions from IBP supporters. The adult male Black-headed Grosbeak pictured above is wearing a tiny GPS unit that recorded his precise location every six weeks for one year. Nine grosbeaks were fitted with the units in 2014 at an IBP MAPS station in Yosemite National Park.
Our objectives were to establish links between breeding, migration, and wintering areas, and document “molt migration.” Fall molt is a vulnerable time for birds: it is energetically taxing and may impair flight. Recent research indicates many species suspend their southbound migration to molt in the southwestern U.S. and northwestern Mexico, where late summer monsoon rains provide ephemeral but abundant insects, seeds, and protective cover.
In 2015 we recovered one GPS tag when the bird returned to Yosemite to breed. The data revealed the precise locations where he spent the fall in northwestern Mexico, and the winter in southern Mexico. This study was only the second using tracking technology to document molt-migration in landbirds in western North America, and the first to do so using highly precise GPS. Contributions from supporters like you make this kind of work possible.