An alarming new report by National Audubon Society (NAS) reveals that hundreds of bird species are threatened by global warming. NAS ornithologists spent seven years studying 588 bird species and found that 314 face significant risk in a warming world. Of those, 126 species are at risk of severe declines by 2050, and a further 188 species face the same fate by 2080, with numerous extinctions possible if global warming is allowed to erase the havens birds currently occupy. To understand the links between where birds live and the climatic conditions that support them, the NAS ornithologists analyzed more than 40 years of historical North American climate data and millions of historical bird records from the U.S. Geological Survey’s North American Breeding Bird Survey and the Audubon Christmas Bird Count. Understanding those links allows scientists to project where birds are likely to be able to survive—and not survive—in the future.
Throughout the summer and fall months, I watch birds use the berry-producing trees and shrubs on our property. The fruit is a magnet for many birds and gives them a wonderful diet supplement during the breeding season and migration. Many bird species have at least a partially frugivorous diet and will eat fruit regularly.
As most of you know, the chimney of Agate Hall on the University of Oregon campus is an ecologically significant migratory stopover for tens of thousands of Vaux’s Swifts during the spring and fall months. During last year’s fall migration, over 45,000 birds were counted entering the chimney. The number is not a total of the birds that might have used it, because counts were done only weekly and sporadically. (If we had volunteers to do daily counts, the numbers would be far higher.) Agate Hall is included on the Vaux’s Happening website as one of the most active Vaux’s Swift roost sites. (See www.vauxhappening.org/Vauxs_Happening_Home.html for more information.)
A Cooper’s Hawk regularly visits the bird-feeder area on our property in the southwest hills of Eugene. The raised bird feeders are in a deer-fenced 20' x 20' space filled with plants and flowers and surrounded by trees. In our effort to provide suitable habitat for songbirds, we have attracted the resident predator of birds.
Each fall, I anticipate the arrival of the first White-throated Sparrow at our feeder. We usually see only one or two individuals that stay from November to March or April. Then they leave, presumably to fly north to find breeding territory along the west coast or interior of Canada—or as the biologists say, to achieve their biological potential. When the sparrows arrive for the winter, I always wonder where they have been since last spring. Did they find a mate and adequate habitat to breed successfully? Why do we never see more of them? Are they the same birds that appeared last year at the feeder? Always mysteries without answers.
One reason I love spending time in my garden is just to be outdoors. Gardening is a great excuse to be in the yard and watch birds at the same time. If I had not been checking the fruit trees the morning of August 31, I would not have seen the dark bird in the lower field sallying out from the bird boxes and flying back to perch, catching insects. It gradually made its way from box to box, up toward my garden area. I grabbed the binoculars (I keep them nearby) and saw it was a Black Phoebe! This was the first sighting for the species on our property, and it made my morning! Its plumage was not the bright black of an adult, so I assume it was a first-year bird exploring the area. It spent about 15 minutes in my view, then flew up and over some trees to the north.