Field note. Specimen gathering: approximately four thousand humans, each having voluntarily encased itself in a second organism.
The humans have manufactured artificial pelts, tails, and cranial structures resembling predators they do not resemble, and put them on. Wolves. Foxes. Species I cannot classify, likely invented. Inside each hollow head, a single human peers out through a mesh grille, sweating at a rate that suggests thermal distress, and yet the specimen does not remove the head. This is important. Comfort is available and refused.
They embrace constantly. Two costumed humans meet, spread their padded limbs, and press their false bodies together, though neither can feel the other through the foam. The contact is entirely symbolic. They know this. They do it anyway.
I initially recorded the pelts as camouflage or intimidation display. This was an error. The disguise conceals nothing and threatens no one; the humans are, if anything, more recognizable to each other as themselves while wearing the head of a made-up creature. The false face is where the true one comes out. I do not have language for this inversion in my report and have flagged it for the committee.
Observed one specimen, overheated, remove its head in a quiet corridor. Underneath: an ordinary human, damp, red, breathing hard, grinning at nothing. It sat alone for ninety seconds. Then it put the head back on and walked toward the noise.
Conclusion pending. The species appears to require an outer body before it will let anyone near the inner one.