Avian anatomy tends to be straightforward once you know what you're doing. Of course, there's no way to rule out that birds on your world came to be via a completely different evolutionary path than they did in ours, in which case we'll likely be reduced to genetic analysis.
[This is probably intensely technobabble to Prompto, at least.]
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[This is probably intensely technobabble to Prompto, at least.]