All About Chimney Swifts

by | Chimney Swifts

If you have ever heard chattering, fluttering, and other noises coming from your chimney as the weather gets warmer, there is a good possibility that chimney swifts have taken over your chimney as their new home. These migratory birds are named for their habit of nesting in chimneys. Once a family of chimney swifts has nested in your chimney, it is illegal to remove them. Some of our customers choose to share their chimneys with these birds every year. However, Hudson Chimney is often asked how to prevent chimney swifts from setting up their summer homes in their chimneys, and we recommend installing a chimney cap with mesh siding to keep these birds from ever entering your chimney. We would like to tell you more about chimney swifts and what you can do about them nesting in your chimney.


What exactly are chimney swifts?

According to the Driftwood Wildlife Association’s project to promote the conservation of chimney swifts, they are fascinating, adaptable birds who learned to nest and roost in chimneys when their native habitat of large hollow trees in forests of North America were cut down. The birds make their return from South America after their wintering is over, and as they are migratory, they tend to return to the same nesting area. However, if a family of chimney swifts does nest in your chimney, you should be aware that these birds are protected by the Migratory Bird Treaty Act, and removing or destroying nests with eggs or young can result in fines and penalties.

What should I do if I would like to share my chimney with chimney swifts?

On the Driftwood Wildlife Association’s website, the article “Being a Good Chimney Swift Landlord” offers invaluable tips for those who do not mind sharing their chimney with these birds. Because they do only nest during the summer season, this article recommends having your chimney swept in mid-March to have all of the creosote build-up removed. An abundance of creosote deposits makes it impossible for the chimney swifts to build their nests to the walls without danger of falling. This article also stresses the importance of chimney swifts being protected by federal law and warns against chimney sweep businesses who illegally remove chimney swift nests and eggs. Be wary of companies who advertise “bird removal,” as this is a blatant violation of state and federal laws that protect migratory birds. Instead, choose a trusted company like Hudson Chimney to perform your annual chimney sweep. Even though the noises of the baby birds chirping for food can be shrill and annoying, they will not last forever. Remember that this is only temporary, and after this short period, you will practically not even realize the chimney shifts are there. However, be sure your damper is completely closed to keep them from flying into your house.

What should I do after the chimney swifts leave in the fall?

The nests of these birds are small, cup-shaped constructions of small twigs glued to chimney walls by the saliva of the chimney swifts. Too small to be a fire hazard, you will still need to contact Hudson Chimney to remove the nest after they leave in the fall. This is needed to remove bird parasites. Additionally, as chimney swifts tend to return to the same nesting spot, you do not want them to try to use the old nest as it will be unstable and probably collapse.

What if I want to prevent these birds from nesting in my chimney?

A good quality chimney cap that is equipped with mesh screening is the best prevention against chimney swifts moving into your chimney. Hudson Chimney sells and installs a variety of different caps, and we can advise you on the best time to install your new chimney cap.

Want to know more information about chimney swifts? Contact Hudson Chimney to learn more about these birds as well as about chimney cap installation.