Life History, Abundance, Activity, and Special Behaviors
Cochranella granulosa is a nocturnal species (Savage 2002). Males call from trees 5-10 m above fast-flowing streams (Savage 2002). The call is a series of rapid harsh notes "creep-creep-creep" at a dominant frequency of 4-4.5 kHz (Savage 2002). Eggs are generally laid arboreally above streams in a single-layered jelly mass approximately 20 X 35 mm, with each clutch containing 49-60 eggs (Savage 2002), although this species also occasionally breeds in ponds (Guayasamin et al. 2009). Eggs are black and white and measure 1.5 mm in diameter by themselves or 3 mm with the envelope (Savage 2002). The jelly mass hangs over the edge of the leaf, forming a drip tip so that water constantly flows over the eggs (Savage 2002). No long-term parental care is provided (Savage 2002). The tadpole is a detritivore that burrows in deposits of organic materials (Altig et al. 2007).