Bird species – आवारा मुसाफिर

Humans might have driven 1,500 bird species to extinction

December 21, 2023433 Views

Number twice previous estimates, many of these were never documented Around one in nine bird species has gone extinct in the past 126,000 years, according to a study published in Nature Communications, and humans probably drove most of those extinctions. The findings suggest the rate of bird extinctions is more than double the number estimated previously — and that more than half of the extinct bird species were never documented. The global magnitude of these previously undetected extinctions is likely to “come as a shock to many”, says Jamie Wood, a terrestrial ecologist at the University of Adelaide in Australia. “The sobering thing is that this estimate could actually be conservative,” he says. Over centuries, humans have triggered waves of extinctions among birds and other an...

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There may be more bird species in the tropics than we know

AWARA MUSAFIR BUREAU

November 17, 20211193 Views

Study suggests many isolated bird populations merit species status Study of a perky little bird suggests there may be far more avian species in the tropics than those identified so far. After a genetic study of the White-crowned Manakin, scientists say it's not just one species and one of the main drivers of its diversity is the South American landscape and its history of change. These results are published in the journal Molecular Phylogenetics and Evolution. Over a few million years, ancestors of the White-crowned Manakin expanded from the Andes Mountains into a wide variety of other habitats and became isolated by landscape features. Map markers indicate the locations and number of genetic samples used in the study. Reproduced with permission from the Handbook of the ...