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Post by Clemn A. Macasiano Jr. on May 12, 2012 5:37:27 GMT
Is this a Male or Female Serpent Crested Eagle ?  Image captured yesterday here in Negros Occidental ... |
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Post by steve pryor on May 12, 2012 8:42:07 GMT
Hi Clemn,
No. It is an adult male or female Philippine Serpent Eagle - Spilornis holospilus.
However, beyond the cute answer above, I do know that your real question is whether or not it is possible to sex the adults. The answer, not as far as I know, at least not on gross visible morphology. I am not even sure there are mensural sex differences, i.e., measuring body parts, etc. As far as I know the sexes are indistinguishable both as adults, and as immature birds.
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Post by des on May 13, 2012 7:20:23 GMT
Steve, females average 6% larger on lengths and can be considerably heavier (according to Ferguson-Lees and Christie). So if I had to choose with a gun to my head, I would go for male. But not otherwise  |
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Post by steve pryor on May 13, 2012 16:51:17 GMT
Steve, females average 6% larger on lengths and can be considerably heavier (according to Ferguson-Lees and Christie). So if I had to choose with a gun to my head, I would go for male. But not otherwise Somehow, I missed it. I do have the Ferguson-Lees and Christie (the smaller Field Guide). The HBW was absolutely no help. Thanks for the info. Generally speaking most Raptor females are slightly larger. |
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Post by des on May 13, 2012 17:41:59 GMT
That's from the big Helm guide, Steve
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Post by Paul Guerrero on May 17, 2012 4:05:46 GMT
Steeve and des, what are the titles of the books you are referring too?
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Post by steve pryor on May 17, 2012 7:21:11 GMT
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