Jen Guyton / Collared pratincole (Glareola pratincola) eggs camouflaged on the floodplain, Gorongosa National Park, Mozambique.

Jen Guyton / Collared pratincole (Glareola pratincola) eggs camouflaged on the floodplain, Gorongosa National Park, Mozambique.

Hanne & Jens Eriksen / Collared pratincole (Glareola pratincola) juvenile, Oman, October

Hanne & Jens Eriksen / Collared pratincole (Glareola pratincola) juvenile in flight, Oman, October

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

Roger Powell / Collared pratincole (Glareola pratincola) on ground, Baragem do Caia, Santa Eulalia, Elvas, Portugal, May.

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

Roger Powell / Collared pratincole (Glareola pratincola) with a Dragonfly that it has just caught. Baragem do Caia, Santa eulalia, Elvas, Portugal, May.

Roger Powell / Collared pratincole (Glareola pratincola) preening and shuffling feathers. Baragem do Caia, Santa eulalia, Elvas, Portugal, May.

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

Roger Powell / Collared pratincole (Glareola pratincola) scraping out a nest hollow. 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, with two more watching on. Baragem do Caia, Santa eulalia...