|
|||||||||||
|
|||||||||||
 |
|  |
Press ReleasesBird Watchers Urgently Needed to Track Rusty BlackbirdsCitizen scientists use eBird to monitor alarming drop in numbersApril 10, 2008Populations of Rusty Blackbirds are crashing. Their numbers have plummeted as much as 88–98% over the last few decades, according to data gathered from 1966 to 2006 by the North American Breeding Bird Survey and Christmas Bird Count. Bird watchers across North America are being asked to help scientists track migrating Rusty Blackbirds, April 1–7. They can enter their tallies online at eBird, a bird checklist project developed by the Cornell Lab of Ornithology and Audubon: www.eBird.org. A century ago, the Rusty Blackbird was an incredibly abundant bird. Accounts from the period detail spectacular spring migrations between the species' wintering grounds in the bottomland forests of the southeastern United States and its breeding grounds in the forested wetlands of North America's vast boreal forest. Ornithological reports from New England and southern Canada describe waves of tens to hundreds of thousands of Rusty Blackbirds blackening the earth and clouding the sky in the spring. In many communities, the migration of Rusty Blackbirds was likened to the year's first chorus of tree frogs—a sign that spring had finally arrived. These reports stand in stark contrast to the situation today. Rusty Blackbird populations have suffered one of most staggering population declines of any bird in North America. A better understanding of the Rusty Blackbird's habitat requirements is key to conserving its remaining populations. Spring migration is an especially critical time. Rusty Blackbirds congregate in large flocks which may be particularly vulnerable to habitat losses, blackbird control programs, or other disturbances. Unfortunately, very little is known about the natural history requirements of the Rusty Blackbird during its northward migration. Scientists at Audubon and the Cornell Lab of Ornithology are appealing to bird watchers to help fill this information gap by looking for Rusty Blackbirds migrating north April 1–7. The data collected and reported through eBird will help identify important migration stopover locations and habitats for conservation. It will help researchers examine whether long–term changes to key migration habitats are responsible for the species' decline. If you are interested in participating, please collect the following information, then visit www.ebird.org to send your observations, taking note of:
1. Date, time, and location of the observations Rusty Blackbirds are uncommon blackbirds typically found in wooded swamps and damp forests. At this time of year, their feathers are mostly blackish with females having some rusty edges to the wings and body. Both sexes have "staring" pale eyes. They can sometimes be confused with other species such as the Common Grackle and the Brewer's Blackbird. However the grackle is larger and both these look–alikes have longer tails and thicker bills than the Rusty Blackbird. The Brewer's is also found primarily in open fields rather than wooded areas. The female Red–winged Blackbird bears some resemblance to the Rusty Blackbird but has streaking on its underparts. Read more on identifying Rusty Blackbirds at http://ebird.org/content/ebird/news/RUBL_Survey.html. The eBird project was launched in 2002 by the Cornell Lab of Ornithology and the National Audubon Society. It currently receives up to 50,000 bird checklists per month, providing raw data for maps and charts that reveal trends in bird populations and distribution across North America, Mexico, and the Caribbean–one of the largest databases of bird observations in the world. Media Note: If you need a high–resolution image of the Rusty Blackbird, please email Pat Leonard at pel27@cornell.edu. More information about Rusty Blackbirds:
web1.audubon.org/science/species/watchlist/profile.php?speciesCode=rusbla • Smithsonian Migratory Bird Center: nationalzoo.si.edu/ConservationAndScience/MigratoryBirds/Research/Rusty_Blackbird |
|
|||||||
|
|
|
||||||||||
|
|
|||||||||||
