Whiskered Tern (Chlidonias hybridus)
This swamp bird is rare enough and is under EU protection convention. However its numbers continue to fall throughout all its places of inhabitat. This one was catching little insects on the surface of the swampy lake, hovering over particular places of open water. Flickr version (Full): Canon 6D, Sigma APO DG EF 70-300mm f4.0-5.6, at 300mm, ISO100, 1/640, f6.3