Species:

Holcosus festivus

Central American Ameiva

Some other names for this species:

Central American Whiptail, Tiger Ameiva

Notes on this species:
This species was recently moved into the genus Holcosus; it was formerly known as Ameiva festiva.
Trail from Esquinas Rainforest Lodge, Golfito region, Puntarenas province, Costa Rica
Central American Ameiva (Holcosus festivus)
These brightly colored ameivas were abundant in the leaf litter, but hard to approach for photography or capturing. The one pictured here is a juvenile, and is the only we managed to catch.

Here is a complete list of the species we found on this GreenTracks trip.
Sueño Azul Resort, Sarapiqui, Puntarenas province, Costa Rica
Central American Ameiva (Holcosus festivus)
Here's a reasonably large adult basking in a sunny spot. The adults aren't quite as beautiful as the youngsters, but are still fine-looking lizards.