Robin Chittenden / Red-crowned woodpecker (Melanerpes rubricapillus) feeding at large flower, Trinidad and Tobago, April

Robin Chittenden / Red-crowned woodpecker (Melanerpes rubricapillus) feeding at large flower, Trinidad and Tobago, April

Nick Garbutt / Red-crowned Woodpecker (Melanerpes rubricapillus), Hato La Aurora Reserve, Los Llanos, Colombia, South America.

Robin Chittenden / Red-crowned woodpecker (Melanerpes rubricapillus) on branch, Trinidad and Tobago.

Bernard Castelein / Fly (Physocephala rufipes), Klein Schietveld, Brasschaat, Belgium. August

Nick Upton / Thick-headed fly (Physocephala rufipes), a parasite of bees, feeding on Japanese mock orange flowers (Pittosporum tobira), Lesbos/ Lesvos, Greece, May.

Rod Williams / Thick headed fly (Physocephala rufipes) feeding on Black knapweed (Centaurea nigra) flower, Sutcliffe Park, Eltham, London, England, June.