Tag: "crows" at biology news
USGS biologists tracking West Nile-like virus in birds
...he Mississippi River to be on the lookout for dead crows
andother birds which may indicate that this mosqui...ration with CDC will be analyzing samplesfrom dead crows
to determine if the virus is present. Crows appear to be verysensitive to infection with this virus ...
USGS reports that West Nile virus goes beyond crows
...d as crows." Monitoring mortality in American crows
is especially important because crows
appear to be highly sensitive to the virus. Since many crows
normally travel less than 200 miles the...
West Nile Virus may be new deadly strain, USGS tells Congress
...the infection in people. "The high mortality in crows
and other bird species is unusual for these viruses," McLean said. "This suggests that this virus is more virulent to our native birds or it may represent a new, more virulent strain of the virus." Resident and migratory birds may play an importa...
Today's Science for America's Tomorrow: the USGS FY 2001 Budget
...York and other areas. Work will focus on tracking crows
and other bird carriers of the disease to anticipate possible future areas of outbreaks of encephalitis in people. Another focus will be amphibian research and monitoring, which is slated for a $2 million increase to track the status of fragile amph...
USGS scientists warn: West Nile virus is on the move
...irus will move south. Dr. McLean said that while crows
are especially susceptible to the virus, many othe... is studying the effects of the West Nile Virus on crows
at its high security biological containment facility. http://www.usgs.gov/images/west_nile_virus/a0...
As the grasslands change and disappear, what happens to the birds?
..., Northern Cardinals, Field Sparrows, and American crows
all increased in the areas studied. These birds, Coppedge points out, are all associated with woody areas or are open-habitat generalists. In sharp contrast, however, the team discovered that a number of birds which are endemic to grasslands decline...
Children's book explores why animals stay home to help
...predators. But in other places, breeding pairs of crows
get no help from their kids. "No one is sure why these differences exist, although they probably involve conditions such as food and territory availability," the authors write, hinting at a potentially exciting research project for the next generati...
A little larceny comes naturally to Northwestern crows
...t, the behavior is so prevalent among Northwestern crows
(Corvus caurinus) that it shatters the long-held b...a predator lurking around.' It has been dogma that crows
are vigilant for predators, but they really are vigilant about each other." To observe crows, the H...
Antibodies critical for fighting West Nile Virus infection
...mation. The virus affects mainly birds, especially crows
and jays, but it also can cause disease in horses, humans and other mammals. In humans, West Nile Virus causes serious illness in only a small proportion of infected people. Last year, doctors reported more than 3,500 cases of infection, with 5 to 1...
Crows alter their thieving behavior when dealing with kin or other birds
... birds were related. The researchers observed the crows
for 223 hours over the course of 2 years, looking .... The researchers noted that the majority of the crows
they observed engaged in hunting for food, as well as thievery. A few crows
only hunted and none ex...
Wildlife markets and disease transmission
... flying foxes. Large-scale killing of sparrows and crows
during the Great Leap Forward in China in the late 1950's because they were thought to be pests led to failed rice crops and massive famine because the birds had really been helping to control actual insect pests. In almost all cases, eradication s...
Snowy plover 'nursery' success earns Resource Stewardship Award
...scouraging off-leash dog walking, and scaring away crows
trying to steal eggs from the nests to eat. On a beach where only a few years ago almost no beach-goers could identify a snowy plover, almost everyone walking the beach can now recognize the shorebird. According to Stroh, "The program helped beach ...
Avian flu: Shut down wild bird markets, experts say
.... For example, large-scale killing of sparrows and crows
during the Great Leap Forward in China in the late 1950's resulted in failed rice crops and massive famine because the birds had actually been controlling pests. Dr Robert Cook, Vice President of Wildlife Health at WCS , said, "In almost all case...
Songbirds escaped from Australasia, conquered rest of world
...ard species) and Corvida (1,103 species, including crows
and ravens). The two groups of true songbirds were thought to have separate origins. The Corvida originated in Australasia, but the Passerida were thought to have arisen separately, in Eurasia. The Passerida then supposedly spread from Eurasia to A...
A changing landscape may have dire implications for birds
...list species, such as European starlings, pigeons, crows
and jays, as a consequence of increased housing de...eased edges that nest predators including jays and crows
use," Pidgeon says, "and we know from the work of others that an increase in predation accompanies a...