If you've noticed small, glossy blue birds swooping around your porch and a cup of mud stuck to a beam overhead, barn swallows have likely moved in at your Essex County home. They're graceful fliers and great at catching insects, but their nests can leave a mess on porches, garage entrances and doorways. There's also an important legal point: barn swallows are protected birds, so how and when you deal with them matters. Below, we'll cover how to identify barn swallows, why they choose your home, what the law allows and how to keep them from coming back. If birds are a recurring problem around your home, our bird control service can help you plan ahead.
How To Identify Barn Swallows
Barn swallows are small songbirds that spend much of their time in the air. Look for:
- Color. Glossy steel-blue back and wings, with rusty or buff-colored underparts and a reddish throat and forehead.
- Tail. A long, deeply forked tail with white spots, which is the easiest way to tell them apart from other swallows.
- Flight. Fast, low, swooping flight over lawns, fields and water as they catch insects.
- Nest. An open cup of mud pellets and grass, lined with feathers, attached to a beam, ledge or wall under a roof.
Cliff swallows also build mud nests, but theirs are enclosed and shaped like a gourd with a small entrance. Barn swallow nests are open at the top.
Why They Nest On Your Home
Barn swallows originally nested in caves and on cliffs. Today, they nest almost entirely on buildings and other structures. Porches, open garages, carports, decks, sheds, barns and the undersides of eaves all give them what they need: a sheltered ledge or rough surface, protection from rain and a nearby source of mud and flying insects.
Barn swallows migrate south for the winter and return in spring. They often come back to the same area, and sometimes the same nest site, year after year. Once a spot has been used, it tends to attract birds again.
Why They Can Be A Problem
- Droppings. Nests over doorways, walkways and cars lead to droppings on surfaces below.
- Mud and debris. Nest building can leave mud stains on siding and trim.
- Defensive birds. Swallows may swoop at people or pets who get too close to an active nest.
- Mites. When young birds leave the nest, bird mites left behind can wander into nearby living spaces.
If you're getting bites near an old nest site, read our guide on whether bird mites are dangerous.
What The Law Says
Barn swallows are protected under the federal Migratory Bird Treaty Act, along with most other native birds. In general terms, that means you shouldn't harm the birds or disturb, remove or destroy an active nest that has eggs or young in it. Nests that are still being built or are no longer in use are treated differently, but the details matter. If you're unsure about a specific nest, check with the U.S. Fish and Wildlife Service or the New Jersey Division of Fish and Wildlife before you do anything.
The practical takeaway: if the nest is active, wait until the young have fledged and the birds have finished nesting for the season.
How To Keep Barn Swallows From Coming Back
- Wait out the season. Let active nests finish. Swallows leave once their young are grown and the season ends.
- Remove old nests after they leave. Once a nest is empty and the season is over, take it down and clean the area. Wear gloves and a mask, and bag the debris.
- Clean the surface. Scrape off leftover mud so the spot looks less inviting next spring.
- Block favorite ledges. Before birds return, make ledges and beams harder to build on, or close off open areas like garages when not in use.
- Watch for early building. If you see birds carrying mud to a spot in spring, check with wildlife officials or a professional before you remove anything, so you stay on the right side of the rules.
- Keep doors closed. Swallows readily fly into open garages, sheds and barns. Keeping these closed during spring and summer removes some of their favorite nesting spots.
When To Call A Professional
If swallows keep returning to the same spots or nests are causing a real mess near entrances, a plan before spring makes all the difference. Our NJ DEP-licensed technicians can inspect your home, identify the areas birds are using and recommend steps to discourage nesting that respect wildlife laws. We also check for bird mites and other pests that can come with nests. We offer free inspections with same-day and next-day service.
Barn swallows are welcome insect hunters, just not always right over your front door. With good timing and a little preparation, you can keep them off your Essex County home without breaking the rules that protect them.