Army ants in La Selva

A caterpillar

I first though this glob on the underside of a leaf was an egg mass from a frog, maybe a centrolenid.  I took a picture, and it appears that there is a caterpillar in the center.  Is it alive?

Finally

First time sighting one of the classic frogs of Costa Rica: the red-eyed leaf frog, Agalychnis callidryas.  Absolutely beautiful.

Scinax defends territory

My best guess for these dwellers is Diasporus diastema in the family Eleutherodactylidae. It was formally Eleutherodactylus diastema in Leptodactylidae… so maybe it’s a new family sighting for me!