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Old Thursday 16th May 2013, 21:18   #1
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Difference between a male and female stork

My question is how can I make difference between male and female white storks? I have made a photo to three storks, two (kid and parent) have rd bill, the other kid almost black see photo in link below.
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Old Thursday 16th May 2013, 21:23   #2
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The black bill identifies a youngster. Adult males are slightly larger than females, but it's basically impossible to tell the sexes apart.

Actually I think I see three youngsters in your photos, with patchy bills - part black and part pale pink, different colors being more visible depending on whether the bill is in shadow. I see one adult on the nest, with a vivid pink bill (same as all the adults on the ground).
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Old Thursday 16th May 2013, 22:08   #3
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Old Friday 17th May 2013, 11:08   #4
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red bills - adults, black bills - young juveniles.
adult male has a stronger bill with a more accentuated gonydeal angle (the angle on lower mandible on the distal part of bill) than female but differences are subtle.
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