All specimens were found in February and March. Those from Chinajá were obtained from Xanthosoma and bromeliads; the individual from 10 kilometers north-northwest of Chinajá is an adult male that was calling from a puddle in a fallen tree on March 13. A juvenile having a snout-vent length of 34.7 mm. lacks the pale blue spots on the thighs; instead, the anterior and posterior surfaces of the thighs are bright red.
Hypopachus cuneus nigroreticulatus Taylor
Toocog, 1.
An adult male having a snout-vent length of 41.7 mm. was found at night on the forest floor at the edge of a temporary pond. In life the dorsum was dark brown with chocolate brown markings; the stripe on the side of the head was white; the middorsal stripe was pale orange; the belly was black and white, and the iris was a bronze color.
Characteristically this species inhabits savannas and open forest; thus, its occurrence in the rainforest at Toocog is surprising. This is the southernmost record for the species in El Petén; to the south in the highlands it is replaced by the smaller Hypopachus inguinalis, having rounded, instead of compressed, metatarsal tubercles.
Rana palmipes Spix
Chinajá, 11; 15 km. NW of Chinajá, 1; 20 km. NNW of Chinajá, 1.
With the exception of one recently metamorphosed juvenile having a snout-vent length of 30.7 mm. that was found on the forest floor by day on June 24, and one that was found beside a pool in a cave, all individuals were found at temporary woodland pools or along sluggish streams at night. The largest specimen is a female having a snout-vent length of 107 mm.
Rana pipiens Schreber
Chinajá, 1; 20 km. NNW of Chinajá, 1; Río San Román, 1; Toocog, 1.