Two years ago (Fire Swifts, 3 July 2020) I wrote about enjoying the flight of Chimney Swifts (Chaetura pelagica) while I sat on my back patio. In summer mornings and evenings I could see a flight of ten to twenty Swifts gliding above my house and over the close-at-hand stand of trees as they sought and caught flying insects that lived in the trees, under the leaves, on the branches and trunks. The Swifts also gobbled up the mosquitoes that liked to breed in the ponds along the stream beneath the trees.
But now the Swifts are mostly gone. Sometimes when I am working in my yard I might hear twittering in he sky. I look up and might see three to five Swifts overhead.
Have I noticed a change in the number of insects I have to swat or other troublesome flying insects? Not so much, but maybe there are more gnats this year than in others.
Where did the Swifts go? I have no idea. But I hope they found a place to their liking and have not just become part of the 5 billion songbirds that we lost since 1970. That comes to a false number average of 60 million birds lost in each of those years. If we were to think of birds as people that is Nine Times the population of the United States lost each year. Now it sounds like a big number.
There are numerous factors that are leading to a decline in the number of songbirds in the United States. These factors include: tall buildings – birds crash into them during their migrations; feral cats – put out of the house at night kill millions of song birds each year; diseases – some of which are suspected of becoming more prevalent due to the warming climate; and habitat destruction – when our towns and cities and suburbs are changed to accommodate our expanding population.
I believe the main reason that I do not see my Chimney Swifts wheeling overhead in the early morning and at twilight is because of habitat destruction.
Was there some forest that was cut down in my neighborhood? No; the last large tract of timbered grazing area in my town was destroyed and filled with houses in the 1990s. Swifts might live in hollowed out trees that happened to stand in an old forest.
Audubon tells a story of when we was cataloguing and painting the birds of North America of finding a tall, hollowed out sycamore tree in Kentucky. He stepped inside and found it filled with Chimney Swifts which had made nests on the interior walls of their “chimney”.
My Swifts had no such palatial home as I believe they nested in an old brick chimney of a boiler/heater for a small hotel on the highway near my house. When the motel was torn down to make way for a gas station and store, the chimney was torn down. This was the same time that my Swifts disappeared. I have made the assumption that the Swifts nested in the old chimney.
Is there a way to bring the Swifts back to the area of my neighborhood?
I think there is.
A quick search of the internet (searching “Swift Tower”) turns up initiatives by individuals, groups and communities to maintain a healthy and helpful population of the insect-eating Swifts. The individuals and groups do not build free standing brick chimneys. They build stand alone “Swift Towers”. Several State Audubon societies have articles on building Swift Towers on both private and public lands. There are links on these pages to other organizations as well, including designs for the towers. As one article states, if you are asked what you are building, just tell them it’s a bird house.
And what of my small population of Swifts. I will approach the company that is building the gas station, and tell them the story of my neighborhood Swifts. And I will ask them if they would build a Swift Tower to replace the old chimney.
And for my City I plan to attend a council meeting and ask that they consider requesting that any companies that are tearing down old establishments that have chimneys to replace that chimney with a Swift Tower.
I think the twittering I hear in the mornings and evenings is worth that little bit of effort.
Audubon Society of Western Pennsylvania (ASWP) is supporting Chimney Swift protection through a variety of approaches. We have installed nearly 150 Chimney Swift towers to provide breeding habitats for these birds. Audubon’s Chimney Swift Tower Program | Audubon Society of Western PA (aswp.org)
John James Audubon’s experience in visiting a large dead sycamore tree filled with the nests of Chimney Swifts is provided at American Swift | John James Audubon’s Birds of America. He estimated their number to be 9,000.
To read more information about the decline of our songbird population see the 2019 study as published in Science magazine. It may be found at – Nearly 3 Billion Birds Gone | Birds, Cornell Lab of Ornithology and Where Have the Songbirds Gone? | NASA Applied Sciences