[Length 13 in. Wingspan 31 in.]

This Forster's Tern was photographed at Boca Chica Beach, Brownsville, Texas. Photo taken with a AF-S VR Nikkor 300mm f/2.8G IF-ED lens (EFL=450mm) on a Nikon D7000 camera. (Date: January 23, 2012)

[Length 14 in. Wingspan 34 in.]

This Gull-billed Tern was photographed at the outer beach, South Padre Island, Texas. Photo taken with a AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED lens (EFL=450mm) on a Nikon D7000 camera. (Date: June 28, 2012)

[Length 14 in. Wingspan 34 in.]

These Gull-billed Terns performing courtship display were photographed at Brigantine NWR, New Jersey. Photo taken with a Celestron 1250mm f10.0 mirror lens on Ektachrome 800 film. (Date: May 1984)

[Length 14 in. Wingspan 34 in.]

This winter plumaged Gull-billed Tern was photographed at San Bernard NWR, Brazoria, TX. Photo taken with a AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED lens (EFL=450mm) on a Nikon D200 camera. (Date: January 16, 2009)

[Length 14 in. Wingspan 34 in.]

This winter plumaged Gull-billed Tern was photographed at San Bernard NWR, Brazoria, TX. Photo taken with a AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED lens (EFL=450mm) on a Nikon D200 camera. (Date: January 16, 2009)

[Length 9 in. Wingspan 20 in.]

This Least Tern was photographed at the Boca Chica beach, TX. Photo taken with a AF-S VR Nikkor 300mm f/2.8G IF-ED lens + Nikkor TC14E II 1.4x Teleconverter (EFL=630mm) on a Nikon D300 camera. (Date: May 4, 2009)

[Length 9 in. Wingspan 20 in.]

This immature Least Tern was photographed on Honeymoon Island near Dunedin, Florida. Photo taken with a Nikkor 300mm ED f4.5 lens on Kodachrome 64 film. (Date: August 1981)

[Length 9 in. Wingspan 20 in.]

This Least Tern was photographed near a traditional nesting site at Cape May, New Jersey. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: May 1996)