Bernard Castelein / Small / Little pratincole {Glareola lactea} in flight, Bund Baretha, Rajasthan, India

Wim van den Heever / Large flock of Collared pratincoles (Glareola pratincola) taking off from floodplains, Chobe River, Botswana.

Roger Powell / Two Collared pratincoles (Glareola pratincola) engaged in courtship display, Baragem do Caia, Santa eulalia, Elvas, Portugal

Roger Powell / 'Pyramid' of three Collared pratincoles (Glareola pratincola) attempting mate with each other, with adult female brooding chick at the bottom, with two more watching on. Baragem do Caia, Santa eulalia...

Roger Powell / 'Pyramid' of three Collared pratincoles (Glareola pratincola) attempting mate with each other, with adult brooding chick (unseen in this photograph) at the bottom, and one more watching on. Baragem do...

Roger Powell / Collared Pratincoles (Glareola pratincola) in courtship display, female soliciting copulation. Baragem do Caia, Santa eulalia, Elvas, Portugal, May.

Roger Powell / Collared Pratincoles (Glareola pratincola) engaged in courtship display. female soliciting copulation. Baragem do Caia, Santa eulalia, Elvas, Portugal, May.

Roger Powell / Collared pratincoles (Glareola pratincola) taking off, Baragem do Caia, Santa eulalia, Elvas, Portugal, May.

Roger Powell / 'Pyramid' of three Collared pratincoles (Glareola pratincola) attempting mate with each other, with adult female brooding chick at the bottom. Baragem do Caia, Santa eulalia, Elvas, Portugal, May.

Roger Powell / Collared pratincoles (Glareola pratincola) engaged in courtship display, male feeding female. Baragem do Caia, Santa eulalia, Elvas, Portugal, May.

Markus Varesvuo / Collared Pratincole (Glareola pratincola) Israel, March

Markus Varesvuo / Collared Pratincole (Glareola pratincola) portrait, Israel, March

Markus Varesvuo / Collared Pratincole (Glareola pratincola) with insect prey, Israel, March

Markus Varesvuo / Collared Pratincole (Glareola pratincola) flying, carrying insect prey to nest, Oman, March

Markus Varesvuo / Collared Pratincole (Glareola pratincola) pair at ground nest, Oman, March

Zoltan Nagy / Common Pratincoles (Glareola pratincola) among salt marsh vegetation, near the Danube Delta and the coastal lagoons. Vadu, Romania, May.

Barrie Britton / Grey Pratincole (Glareola cinerea) bathing. Douala-Edea Reserve, Cameroon. Photograph taken on location for BBC Africa series, May 2010.

Juan Manuel Borrero / Illustration of Collared Pratincole (Glareola pratincola). Pencil and watercolor painting.

Hanne & Jens Eriksen / Collared pratincole (Glareola pratincola) calling profile in field, Oman, April

Roger Powell / Collared Pratincole (Glareola pratincola) male claiming nesting territory in a flower meadow, Guerreiro, Castro Verde, Alentejo, Portugal, April

Roger Powell / Collared Pratincoles (Glareaola pratincola) males courting a recently arrived female, Guerreiro, Castro Verde, Alentejo, Portugal, April

Roger Powell / Collared pratincole (Glareola pratincola) male greeting a recently arrived female, Guerreiro, Castro Verde, Alentejo, Portugal, April

Roger Powell / Collared pratincole (Glareola pratincola) feeding on a flower head, Guerreiro, Castro Verde, Alentejo, Portugal, April

Roger Powell / Collared pratincole (Glareola pratincola) standing on a raised soil mound, looking for a mate, Guerreiro, Castro Verde, Alentejo, Portugal, April

Roy Mangersnes / Collared pratincole (Glareola praticola) on sandbank, Okavango Delta, Botswana, November.

Ole Jorgen Liodden / Collared Pratincole (Glareola pratincola) portrait. Okavango, Botswana, November.

Ann & Steve Toon / Collared pratincole (Glareola pratincola) with insect prey, iSimangaliso wetland park, Kwazulu Natal, South Africa, February

Hanne & Jens Eriksen / Collared pratincole {Glareola pratincola} juvenile, Sohar, Oman

Hanne & Jens Eriksen / Collared pratincole {Glareola pratincola} Sohar, Oman

Hanne & Jens Eriksen / Collared pratincole {Glareola pratincola} juvenile at water, Sohar, Oman

Hanne & Jens Eriksen / Collared pratincole {Glareola pratincola} juvenile calling, Sohar, Oman

Hanne & Jens Eriksen / Collared pratincole {Glareola pratincola} pair at nest with chick and egg, Sohar, Oman

Hanne & Jens Eriksen / Collared pratincole {Glareola pratincola} panting on nest in extremely hot weather, Sohar, Oman

Hanne & Jens Eriksen / Collared pratincole {Glareola pratincola} sitting on the ground, panting, Sohar, Oman

Hanne & Jens Eriksen / Collared pratincole {Glareola pratincola} displaying, Sohar, Oman

Hanne & Jens Eriksen / Collared pratincole {Glareola pratincola} in flight, Sohar, Oman

Hanne & Jens Eriksen / Collared pratincole {Glareola pratincola} juvenile, Sohar, Oman.

Bernard Castelein / Small / Little pratincole {Glareola lactea} in flight, Bund Baretha, Rajasthan, India

Bernard Castelein / Small / Little pratincole {Glareola lactea} Bund Baretha, Rajasthan, India

Mike Wilkes / Pratincole {Glareola pratincola} Lesbos, Greece

Mike Wilkes / Pratincole {Glareola pratincola} Lesbos, Greece

Juan Manuel Borrero / Pratincole {Glareola pratincola} Delta del Ebro NP, Catalonia, Spain

David Kjaer / Collared Pratincole (Glareola pratincola) Lesbos, Greece

David Kjaer / Collared Pratincole (Glareola pratincola) Lesbos, Greece

David Kjaer / Collared pratincole (Glareola pratincola) Lesbos, Greece.

David Kjaer / Collared pratincole (Glareola pratincola) Lesbos, Greece.

David Kjaer / Collared Pratincole (Glareola pratincola) Lesbos, Greece

David Kjaer / Collared Pratincole (Glareola pratincola) Lesbos, Greece

Hanne & Jens Eriksen / Little pratincole {Glareola lactea} on lawn, Oman

Hanne & Jens Eriksen / Collared pratincole {Glareola pratincola} with newly hatched chick and egg, Sohar, Oman

Tony Heald / Red winged pratincole, immature {Glareola pratincola} Chobe NP, Botswana

David Kjaer / Collared pratincole {Glareola pratincola} Lesbos Greece

David Kjaer / Collared pratincole {Glareola pratincola} Lesbos Greece

Dietmar Nill / Collared pratincole {Glareola pratincola} pair in mating display, Extremadura, Spain

Richard Du Toit / Collared pratincole (Glareola pratincola) singing, Savuti Chobe NP, Botswana