Saturday, March 12, 2011

ageing and sexing Short-eared Owls

it seems to be subject to some overlap but birds with deeper buff underparts seem to usually be females while males are whiter or creamy on the underparts with a more marked gorget of streaks on the upper breast and very fine streaks on the flanks; 3-5 dark bars on the outer tail feather for females v 2-3 dark bars on the outers for males; the central tail feather tip has a solid black or white? tip on adults with an inverted black V on the shaft pointing to the tip of the central two feathers being a feature of juveniles -- so taking all this into account I make this bird a juvenile male -- the bird being photographed by most people at Worlaby is by the same criteria a juvenile female

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