I am aware it is a Biepolenis sp., yet Biepolenis bassus is a division of the Biepolenis species. I think it is justifiable to keep either Biepolenis sp. or add Biepolenis bassus, since Biepolenis bassus is one of two specific species in the Bipolenis family. Please comment if you find another butterfly like this!
Ok, folks, thank you very much for your interest - really. I see that there is a large margin of uncertainty (!) in this ID. So, I'll do this: I'll keep the ID as Blepolenis sp., until I get a new picture, ok? Again, thanks to all.
Correction: The "bassus" in "Biepolenis bassus" is not capitalized. Biepolenis bassus is noticeably lighter, in similarity to your photo, than other owl butterflies.
I believe now it is a Biepolenis Bassus. When I searched the scientific name on Google Images, many of these butterflies had similar markings, as well as a cut on the back. This may suggest they are common prey.
I am pretty sure it is not a Caligo. It is a Blepolenis sp., not sure which one. Might be Bassus or Batea. Important parts are missing, so probably there is no closer ID possible.
Asergio. This is certainly a Caligo (owl butterfly) I cannot find a species match. I am interested that its ocellus is missing and wonder if is hind wing along with missing eye spot might not have been pecked by a hungry bird.
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