Sentence examples for concentrations of birds from inspiring English sources
There is a growing trend toward aerial applications of deadly poisons, like parathion, a member of the family of organic-phosphate insecticides, for the purpose of "controlling" concentrations of birds distasteful to farmers.
These dense concentrations of birds are thought to be a defence against attacks by birds of prey such as peregrine falcons or Eurasian sparrowhawks.
The Chicago region is a natural corridor for migratory birds, and the risk for tick and pathogen introduction is likely to be elevated on migratory flyways because of seasonal concentrations of birds.
Salim Ali, India's most famous ornithologist, identified Thattekkad as having one of the richest concentrations of bird diversity in the country.
The greatest concentrations of bird species are in the Amazon lowlands, with secondary centres in Central America and the forests along the coast of Brazil, as can be seen in the accompanying maps, which show distributions of songbird species in the Americas.
Dr Yossi Lesham, director of Israel's International Centre for the Study of Bird Migration, explained that per square mile, the country has one of the highest concentrations of bird traffic in the world.
To detect BIRD-2-induced cell death, 15 SCLC lines were treated with a range of concentrations of BIRD-2 in parallel with a scrambled version of BIRD-2 (Scr) to control for non-specific peptide-mediated toxicity.
The concentration of birds in Asia, for example, is behind the spread of avian flu there, he said.
Mr Rogers is particularly concerned about the threat of avian flu posed by massive chicken farms because of their sheer size and concentration of birds.
Mr. Kimball also speaks to scientists, who call the concentration of birds there "the Central Park effect," and who attempt to count every bird in the park each Christmas season to produce the annual report of birds in decline, which now includes nearly a quarter of all species.
Winter is a season of highest concentration of birds and hunting pressure but woodcock precise habitat requirements are poorly known.
