[Length 9.75 in. Wingspan 27 in.]

This Whiskered Tern was photographed at a fish pond near the Red-crowned Crane Refuge, Dafeng, Jiangsu, China. 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: May 17, 2017)

[Length 9 in. Wingspan 23 in.]

This White-winged Tern was photographed at an area of shrimp ponds, Dafeng, Jiangsu, China. 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: May 12, 2017)

[Length 9 in. Wingspan 23 in.]

This White-winged Tern was photographed at an area of shrimp ponds, Dafeng, Jiangsu, China. 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: May 12, 2017)

[Length 9.5 in. Wingspan 23 in.]

This White-winged Tern was photographed at Ted Harvey WMA, DE, USA. Photo taken with a Nikkor EDAF 300mm f4.0 lens on Kodachrome 200 film. (Date: August 1993)

[Length 9.5 in. Wingspan 23 in.]

This White-winged Tern was photographed at Ted Harvey WMA, DE, USA. Photo taken with a Nikkor EDAF 300mm f4.0 lens on Kodachrome 200 film. (Date: August 1993)

[Length 16 in. Wingspan xx in.]

Peruvian Thick-Knees are found in the hills and mountains of South America with much of the population centered in Peru. This captive Peruvian Thick-Knee was photographed at Gladys Porter Zoo, Brownsville, Texas, USA. 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: November 29, 2013)

[Length 16 in. Wingspan xx in.]

Peruvian Thick-Knees are found in the hills and mountains of South America with much of the population centered in Peru. This captive Peruvian Thick-Knee was photographed at the Gladys Porter Zoo, Brownsville, Texas, USA. Photo taken with a Nikon CoolPix 7600 camera (EFL=114mm). (Date: May 12, 2011)

[Length 16 in. Wingspan xx in.]

Peruvian Thick-Knees are found in the hills and mountains of South America with much of the population centered in Peru. This captive Peruvian Thick-Knee was photographed at the Gladys Porter Zoo, Brownsville, Texas, USA. Photo taken with a Nikon CoolPix 7600 camera (EFL=205mm). (Date: May 12, 2011)

[Length 16 in. Wingspan xx in.]

Peruvian Thick-Knees are found in the hills and mountains of South America with much of the population centered in Peru. This captive Peruvian Thick-Knee was photographed at Gladys Porter Zoo, Brownsville, Texas, USA. 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: November 29, 2013)