Report shows that even many common species are dwindling
FRISCO — Bird populations are dwindling all over North America, especially in the Southwest, where some species have declined by as much as 48 percent since the late 1960s, according to the 2014 State of the Birds report released last week.
In Utah, Arizona and New Mexico, habitat loss and fragmentation due to development are the largest threats. These are also significant threats in the nation’s grasslands, where breeding birds like the eastern meadowlark and the bobolink have declined by 40 percent since 1968, with the steepest declines coming before 1990, when stakeholders started investing in grassland bird conservation.
And experts say it’s not just rare birds that are vanishing. The report includes a list of 33 common species in steep decline, losing ore than half their global populations over the past four decades — a clear warning sign that birds can undergo a massive population collapse with surprising rapidity. For example, passenger pigeon populations crashed from 2 to 3 billion birds to none in the wild in just 40 years. Continue reading