Migrador Nocturno (Eagle & Insect Monster Transformations)

I'm not sure what exactly is going on in this trippy Argentinean graphic novel. I think the story involves people who can turn into weird-looking eagles. 

Here's an early transformation:

And a longer one involving the male protagonist:

 

He meets up with a lady who has the same talent, and they find themselves turning into birds mid-air:

 Toward the end they make love, merge into each other, and turn into a freaky insectoid monster...