Distribution and Habitat
Dendrobates granuliferus occurs mainly in southwestern Costa Rica, on low mountains near Puntarenas, Costa Rica, at elevations from 20 m - 100 m above sea level (Meyer 1992, 1993; Savage 2002; Stuart et al. 2008). Its range extends down into the adjacent southwestern region of Panama (Young et al. 1999; Ibañez et al. 2000). It has also been found in much smaller numbers along the Atlantic Coast, in a region of southeastern Costa Rica adjacent to Panama (Myers et al. 1995). It occurs in humid lowland forest, near streams, and has been reported from both undisturbed primary forest (Meyer et al. 1993; Miller and McFarlane 2008) and secondary forest (van Wijngaarden and Bolaños 1992; Miller and McFarlane 2008) as well as plantations (Stuart et al. 2008) and bamboo habitat (Miller and McFarlane 2008). However, it appears to be far more common in primary forest (Meyer et al. 1993; Miller and McFarlane 2008).