Posted on December 13, 2015 by Bob Berwyn
Spotted owl. Photo courtesy USFWS.
Climate change may bolster spotted owl survival in the future
Northern spotted owl populations continue to decline across the Pacific Northwest, researchers said in a new study showing that competition from barred owls, along with habitat destruction and climate change are all factors in population trends.
According to the research, published in The Condor, spotted owls are in decline across all of their range. The findings are based on data from 11 study areas Washington, Oregon and northern California, with a rangewide decline of nearly 4 percent per year between 1985 to 2013. Continue reading
Filed under: biodiversity, climate and weather, endangered species, Environment | Tagged: biodiversity, Birds, endangered species, Environment, Pacific Northwest, spotted owls | Leave a comment »
Posted on October 19, 2015 by Bob Berwyn
Decades of poaching, habitat destruction take toll on birds
Two rare bird species in Central and South America will get protection under the Endangered Species Act, the U.S. Fish and Wildlife Service announced last week. Under the listing, military and great green macaws can’t be imported into, or exported out of, the U.S.
Permits to handle the birds will only be issued for scientific purposes that benefit the species in the wild, or to enhance the propagation or survival of the species, including habitat restoration and research. Continue reading
Filed under: biodiversity, endangered species, Environment | Tagged: biodiversity, Birds, endangered species, great green macaw, military macaw | Leave a comment »
Posted on August 28, 2015 by Bob Berwyn
Biologists say noise impacts should be part of wildlife conservation planning
FRISCO — Outside a few remote wilderness areas, human-caused noise pollution is so common that birds have started to “shout” in order to communicate with each other.
Biologists with the University of Exeter took a close look at how bluebirds alter their songs in response to increases in nearby background noise caused, in many cases, by human activities such as traffic. Continue reading
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Posted on July 10, 2015 by Bob Berwyn
Steep downward trend poses threats to marine ecosystems
Pelagic bird populations are declining at an alarming rate. @bberwyn photo.
FRISCO — Researchers with the University of British Columbia say that global seabird populations — including penguins, albatrosses, petrels and pelicans — have declined by 70 percent since the 1950s — a clear sign that marine ecosystems are in trouble.
The findings are based on an analysis of more than 500 seabird populations , representing about 19 per cent of the global seabird population. The 70 percent decline is equivalent to the loss of about 230 million birds in 60 years, said Michelle Paleczny, a UBC master’s student and researcher with the Sea Around Us project.
“Seabirds are particularly good indicators of the health of marine ecosystems,” said Paleczny. “When we see this magnitude of seabird decline, we can see there is something wrong with marine ecosystems. It gives us an idea of the overall impact we’re having.” Continue reading
Filed under: biodiversity, Environment | Tagged: biodiversity, Birds, Environment, pelagic, seabird decline, seabirds, wildlife | 2 Comments »
Posted on December 26, 2014 by Bob Berwyn
Some birds won’t nest at all during drought years.
Some Sonoran Desert species skip breeding entirely during extreme drought
FRISCO — Drought-driven delayed nesting by some southwestern bird species may lead to crashing populations, scientists said in a new study that looked closely at Sonoran Desert bird species, such as Black-tailed Gnatcatchers and Verdins.
The research suggests drought conditions are delaying nesting by two weeks or more for some species. Despite recent rainfall, drought conditions persist in much of the Southwest, making life tough even for species adapted to a dry environment.
Delayed nesting makes the birds more vulnerable to nest predators and parasites, according to the scientists with Point Blue Conservation Science and the U.S. Geological Survey finds that increased drought frequency in southwestern North America results in increased instances of delayed nesting. Continue reading
Filed under: biodiversity, climate and weather, climate change, Environment, global warming | Tagged: Birds, climate change, drought, extreme weather, Southwest | Leave a comment »
Posted on November 3, 2014 by Bob Berwyn
‘It is clear that the way we are managing the environment is unsustainable for many of our most familiar species’
Bird populations across Europe have experienced sharp declines over the past 30 years, with the majority of losses from the most common species, according to a new study from the University of Exeter (UK).
The study documented a decrease of 421 million individual birds over 30 years. About 90 percent of these losses were from the 36 most common and widespread species, including house sparrows, skylarks, grey partridges and starlings. Continue reading
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Posted on October 8, 2014 by Bob Berwyn
Whooping crane chicks, hatched and raised by their parents at the U.S. Geological Survey’s Patuxent Wildlife Research Center in Laurel, Maryland, were released on Necedah National Wildlife Refuge in Wisconsin.
Project aims to restore migratory flock in eastern U.S.
FRISCO — Efforts to boost a self-sustaining flock of migratory whooping cranes in the eastern U.S. got a boost last month with the release of four chicks that were raised in captivity at a U.S. Geological Survey research center in Maryland. The crane chicks were released on the U.S. Fish and Wildlife Service’s Necedah National Wildlife Refuge in Wisconsin.
According to the U.S. Geological Survey, the six-month-old birds are part ofan experimental rearing and release method referred to as “parent-rearing.” The parent-reared whooping crane chicks were hatched and raised by captive adult whooping cranes. Continue reading
Filed under: biodiversity, endangered species, Environment | Tagged: biodiversity, Birds, endangered species, US Fish and Wildlife Service, USGS, whooping cranes, wildlife restoration | Leave a comment »