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Beak/mouth size and gender in eaglets
Topic Started: Apr 5 2017, 06:49 PM (128 Views)
Shel
Member
In adult eagles the females have longer beaks/mouths (I know there is a more scientific way to say this..but I think you will know what I mean). Does this show up in juvenile eagles and if so, when. My real question being, can you look at a young eaglet and, based upon the beak to head size ratio, or how far back the end of the beak goes, make a good guess as to gender?

Or....does this come much later?

Thank you for any information! :<<o>>:
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Eagle Guy
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We generally determine the sex of the eagles by the depth of the beak (top to bottom). This can be determined in birds that are 7-8 weeks old. Males tend to be less than 32 mm and females greater than 32 mm. I'm not sure about the mouth length you mention. I know there was a video to describe the difference between the male and female at Decorah, but that is only specific to that pair and not eagles in general.
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