[Length 5.75 in. Wingspan 14.5 in.]

This Tree Swallow at Nest Box was photographed at Oak Hammock Marsh WMA, Stonewall, Manitoba, Canada. Photo taken with a AF-S VR Zoom-Nikkor 80-400mm f/4.5-5.6G IF-ED lens on a Nikon D7100 camera. (Date: June 15, 2018)

[Length 5.75 in. Wingspan 14.5 in.]

This pair of mating Tree Swallows was photographed at the Magee Marsh boardwalk, Oak Harbor, Ohio, USA. Photo taken with a AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED lens (EFL=420mm) on a Nikon D300 camera. (Date: May 16, 2012)

[Length 5.75 in. Wingspan 14.5 in.]

This Tree Swallow at Nest Box was photographed at Oak Hammock Marsh WMA, Stonewall, Manitoba, Canada. Photo taken with a AF-S DX VR Zoom-Nikkor 18-200mm f/3.5-5.6G IF-ED [II] lens on a Nikon D3200 camera. (Date: June 15, 2018)

[Length 5.75 in. Wingspan 14.5 in.]

This whimsical portrait of a Tree Swallow was photographed at Brigantine NWR, New Jersey, USA. Photo taken with a Celestron 750mm f5.6 mirror lens on Ektachrome 200 film. (Date: April 1976)

[Length 5.75 in. Wingspan 14.5 in.]

This Tree Swallow was photographed at a Wildlife Management Area along the coast of Delaware, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: June 1991)

[Length 5.75 in. Wingspan 14.5 in.]

This adult Tree Swallow was photographed at Brigantine NWR, New Jersey, USA. Photo taken with a Celestron 750mm f5.6 mirror lens on Ektachrome 200 film. (Date: April 1976)

[Length 5.75 in. Wingspan 14.5 in.]

These immature Tree Swallows were photographed in the fall near Manahawkin, New Jersey, USA. Photo taken with a Nikkor 300mm ED f4.5 lens on Kodachrome 200 film. (Date: September 1984)

[Length 5.25 in. Wingspan 13.5 in.]

This Violet-green Swallow was photographed at a campground in the Black Hills of South Dakota, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: May 1992)