Rheas in a West Yorkshire farmers field near Shelf, England, UK - also known as ñandus[a] or South American ostrich, are moderately-sized South American ratites (flightless birds without a keel on their sternum bone) of the order Rheiformes. They are distantly related to the African ostriches and Australia's emu (the largest and second-largest living ratites, respectively), with rheas placing just behind the emu in height and overall size.

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Photo credit: © Windmill Images / Alamy / Afripics
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Keywords: agriculture, air, beak, bird, breed, couple, farm, farming, field, long, natural, nature, necks, open, ornithology, pair, rare, rhea, rheas, sunny, sunshine, unusual, west, wildlife, yorkshire