Barn Swallows Will Soon Be Swarming
The Hive

Watermark 13 - Barn Swallows Will Soon Be Swarming <br> The Hive — The Hive, located in London Ontario, recently installed several Barn Swallow nest platforms around their property.

Currently listed as threatened on the Species at Risk list, Barn Swallows have suffered a population decrease of 65% in recent years. As is the case with all species that make it onto this list, habitat loss is one factor to blame. Barn Swallows prefer an open habitat including city parks, agricultural land, and bodies of water such as rivers, lakes and ponds. As cities grow and land is developed, these open expanses where Barn Swallows live are being destroyed.

Watermark 1 26 - Barn Swallows Will Soon Be Swarming <br> The Hive — This narrow drip edge under a soffit provides enough of a ledge for a Barn Swallow to construct its nest.

Barn Swallows construct their mud nests in a variety of locations, but prefer some type of ledge on a human made structure. Places where Barn Swallows nest include under bridges, eaves troughs, and on top of rafters or beams in sheds and garages. Modern buildings constructed of aluminum or galvanized steel are tightly sealed. This denies Barn Swallows access to their beams and rafters, drastically reducing the number of potential nest sites. If you are a landowner with Barn Swallows on your property, providing these birds with an alternative nesting option is something you can do to help reduce the further decline of this species.

Watermark 1 37 - Barn Swallows Will Soon Be Swarming <br> The Hive — Barn Swallows collect mud to construct their nests. The mud often contains grass and other debris found within the mud. The nests are then lined with grasses and feathers.

While attending BeeFest at The Hive in south London last summer, I noticed several Barn Swallows flying over the open fields of the property. Several of their small mud nests could be seen under the eaves troughs and overhangs of various buildings located on the property.

Watermark 1 53 - Barn Swallows Will Soon Be Swarming <br> The Hive — Barn Swallows, an aerial insectivore, prefer an open habitat that allows them to forage on insects.

Last week I contacted Jenna Goodhand, owner of The Hive, and asked if she would be interested in adding some nest platforms to the sides of the buildings to increase the number of locations where Barn Swallows could build their nests. Knowing the state of these threatened birds, Jenna was more than happy to help out. I was invited out to survey the area and collectively decide where the nest platforms would be best suited.

Watermark 1 48 - Barn Swallows Will Soon Be Swarming <br> The Hive — The overhang on this shed is an ideal location to mount a nest platform under. The narrow ledge of the platform will provide the perfect place for a Barn Swallow to construct its mud nest.

Barn Swallows will reuse the same nest each year, so buildings with sufficient overhangs and ledges and those with nests from last season attached were avoided. It was obvious that the birds were successful here and didn’t require our help. Our focus was on the buildings that had no nests attached. These buildings had great overhangs for nesting under, but lacked a small ledge or suitable surface for the Barn Swallows to attach a mud nest to. Our goal was to install the nest platforms on these buildings to provide more Barn Swallows and future generations of Barn Swallows adequate structures on which to build their nests in hopes of increasing their population. After determining adequate locations, several nest platforms were installed. Jenna and I will be monitoring these platforms throughout the year and I will be adding updates to my blog regarding their success once the birds have returned to the area.

Watermark 1 63 - Barn Swallows Will Soon Be Swarming <br> The Hive — Adding nest platforms to your buildings is something any land owner can do to help this fragile species.

These custom made Barn Swallows nest platforms differ from commercial nest platforms in that the ledge is only 2.5″ wide. This narrow ledge is wide enough for the Barn Swallows to construct their nest, but narrow enough to deter other birds that nest on platforms such as the American Robin or Mourning Dove. Barn Swallow nest platforms should be installed under an overhang on the side of a human made building such as a shed, garage or boathouse; not on a tree or fence post as is the case with nest boxes. Recommended mounting height for the platforms is 7-12 feet off the ground and 5 feet apart. Facing the platforms north or east will ensure they do not get too hot from the afternoon sun. As mentioned, Barn Swallows construct their nests from mud, so positioning the platforms near a garden, shoreline, or other mud source will add to their success.

14738812678 a6c686e392 b - Barn Swallows Will Soon Be Swarming <br> The Hive — Young Barn Swallows peering out of their nest.

If you have Barn Swallows on your property, consider adding nest platforms to your buildings to help this delicate species. Providing adequate habitat and sufficient nest sites are easy steps landowners can take to ensure the future of this species. For best results, platforms should be installed before the birds return, so act fast. Barn Swallows, an aerial insectivore, are great birds to have around as they naturally control insect populations. If adding nest platforms is something you are interested in, my previous post Barn Swallows Nest Platforms has more information, including more images and dimensions.

A special thanks to Jenna Goodhand of The Hive for doing her part to help save a Species at Risk. If you wish to follow along throughout the season, subscribe to my blog via email and have new posts including updates from The Hive sent right to your inbox.

Good birding,
Paul

Creating a Nest Site For a Species at Risk

With six subspecies found worldwide, the Barn Swallow is the most widespread species of Swallow in the world. They are found on six continents; breeding in the Northern Hemisphere and wintering across the Southern Hemisphere. These birds are aerial insectivores, feeding on insects captured in flight.

Hirundo rustica, the Barn Swallow subspecies that breeds in our area, can be observed most years from late April until early September. They prefer open habitat to forage and can be found across farmland, city parks, sports fields, lakes, rivers and ponds. Barn Swallows are so named because their nests are often constructed on narrow ledges inside covered structures such as barns or sheds. Other popular nest sites include: under eaves trough, beneath bridges, and inside culverts. Nests are constructed of mud and attached both to horizontal and vertical surfaces. When positioned on vertical surfaces nests are semicircular in shape, while those on horizontal surfaces are completely round. Feathers and grasses are used to line the nest.

14738812678 a6c686e392 b - Creating a Nest Site For a Species at Risk — Three young Barn Swallows sit in their semicircular nest constructed on a beam beneath a bridge.

Despite their wide range, Barn Swallows close to home are in trouble. These birds are now listed as a threatened species on the Species at Risk list across Canada. In Ontario, between 1966 and 2009, Barn Swallow populations decreased by 65% with the largest decreases happening most recently. Several factors are to blame including: habitat loss, pollution and climate change. The increased use of pesticides in the agriculture industry has significantly reduced the number of insects in many areas, resulting in a lack of food. Chemical pollution results in several health problems including neurological disorders, birth defects and death. Modernization of structures has also contributed to habitat loss. Wooden barns, sheds and boathouses that Barn Swallows previously could find access to and nest in, are being replaced with metal structures that are completely sealed. Barn Swallows are often seen making failed attempts to gain access to these buildings. Even if access is achieved, these modern structures, with their thin metal roofs, are often too hot in their upper sections where nesting would occur and therefore not desirable nesting locations.

IMG 4778 1 - Creating a Nest Site For a Species at Risk — Platform nest boxes specifically designed for Barn Swallows provide nesting habitat where older structures have been removed or replaced.

If you have Barn Swallows on your property, consider leaving these old wooden structures for them to nest in. If you need to replace or have already replaced them, than consider adding a nesting platform to the outside of your new structure. Barn Swallows will quickly accept a nest platform placed under a roof overhang on the side or end of a building. Successful broods have been raised in the presence of humans, where these platforms have been installed. Barn Swallows are quite tolerant of human activity, and watching adults raise their brood is both educational and entertaining. I have constructed such platforms to be installed on the property of landowners where Barn Swallows have previously nested and these modern metal buildings now exist. These nesting platforms are specifically designed for Barn Swallows and differ from other platforms in that the ledge for nesting is only 2.5″ wide. This narrow ledge allows enough room for the Barn Swallow to attach its mud nest, but will prevent other birds that use a platform, such as the American Robin and Mourning Dove, from occupying them.

7331670990 d654eff2f8 o 1 - Creating a Nest Site For a Species at Risk — This Barn Swallow was photographed perched on the same 1 3/4″ wide rafter as its nest sits on. A narrow ledge is all that is required for these birds to nest.

The biggest problem I have seen with artificial nest boxes and platforms is that they are not put up early enough. The intentions of installing them in spring are great, but too often people wait for nice weather and are too late. The nesting platforms must be installed before the Barn Swallows return, in late April. Birds begin searching for an adequate nest site immediately after returning in the spring and it is never too early to put up a nesting platform. Installing one now will ensure it is ready when Barn Swallows return.

If you are interested in one of these nesting platforms for your property, I am currently selling them for $20 each. Platforms measure 13″H x 7.25″W x 3.25″D and are made from Eastern White Pine. Platforms are left rough and unpainted, making it easier for the mud that Barn Swallows use to make their nests adhere. They are easily mounted to any vertical surface with two screws. For more information on these platforms or to purchase please contact me.

Negative human intervention has led to the decline of Barn Swallows and several other species. Now is the time for positive human intervention to help save a Species at Risk. Consider providing adequate nesting habitat for Barn Swallows if they happen to frequent your property. Simple practices like these are something everyone can do to make a difference.

Good birding,
Paul