Marian’s Wildlife Blog – October 2017

Carolina Wren by Doug Pederson

Can there be any doubt now that climate change is affecting the United States dramatically? Its effects are felt strongly in the number and intensity of hurricanes forming in the Atlantic and hitting Texas, Florida, the Caribbean, and Puerto Rico. The number and severity of these hurricanes come about as a result of the warming of sea temperatures. Climate change is also seen in shifts in species populations seen right here in Westford.

There have been shifts in several bird species that are probably due to climate change. In the past fifty years, several species of “southern” birds have come north into New England. Among these are the Northern Cardinal, the Tufted Titmouse, Northern Mockingbird, and most recently, the Carolina Wren and the Red-bellied Woodpecker. All of these species are still seen in the south, but they have expanded their ranges into New England. This is probably in response to our less severe average winter temperatures. Some birds, such as the American Robin and the Eastern Bluebird, which used to be migratory, are now year-round residents. These species are able to shift their diet from insects and worms in the summer to berries in the winter. These are all native species that are welcome here.

But some effects of climate change on species are not so welcome….Continue reading