Roger Powell / Stone curlew (Burhinus oedicnemus) approaching nest of two eggs, Guerreiro, Castro Verde, Alentejo, Portugal, April

Roger Powell / Cattle egret (Bubulcus ibis) in flight carrying a large stick to its nest, Guerreiro, Castro Verde, Alentejo, Portugal, May

Roger Powell / Cattle egret (Bubulcus ibis) in flight, Guerreiro, Castro Verde, Alentejo, Portugal, May

Roger Powell / Little Bustard (Tetrax tetrax) male display, jumping on the lekking ground, Guerreiro, Castro Verde, Portugal, April

Roger Powell / European bee-eater (Merops apiaster) opening its beak wide before ejecting a pellet from it. Guerreiro, Castro Verde, Alentejo, Portugal, May..

Roger Powell / European bee-eater (Merops apiaster) tossing a piece of mineral rich earth into the air before eating it. Guerreiro, Castro Verde, Alentejo, Portugal, May..

Roger Powell / Corn Bunting (Emberiza calandra) male on a lichen covered rock in the centre of its breeding territory. Guerreiro, Castro Verde, Alentejo, Portugal, May.

Roger Powell / Corn bunting (Emberiza calandra) male landing on an Oleander shrub (Nerium oleander) in its breeding territory. Guerreiro, Castro Verde, Alentejo, Portugal, May.

Roger Powell / Corn Bunting (Emberiza calandra) male trying to attract a female by using its open-wing display. Guerreiro, Castro Verde, Alentejo, Portugal, May.

Roger Powell / Common Moorhen (Gallinula chloropus) wading while feeding. Guerreiro, Castro Verde, Alentejo, Portugal, May.

Roger Powell / Common Moorhen (Gallinula chloropus) looking towards camera. Guerreiro, Castro Verde, Alentejo, Portugal, May.

Roger Powell / Common Moorhen (Gallinula chloropus) walking over rocks while feeding. Guerreiro, Castro Verde, Alentejo, Portugal, May.