Dry-season retreat and dietary shift of the dart-poison frog Dendrobates tinctorius (Anura: Dendrobatidae). Phyllomedusa 9(1): 37-52, 2010
"Activity patterns of Dendrobates tinctorius responded to seasonal variation in rainfall. During the rainy season, both males and females colonized recently formed tree-fall gaps and stayed in these forest patches for only a few weeks. The recently fallen, leafy tree crowns probably offered shelter while foraging, as well as a large variety of prey items that were consumed by D. tinctorius (e.g., beetles, mites, wasps, and insect larvae). Frogs that were caught in mature forest during the wet season had lower diversity of prey items in their stomachs and primarily consumed ants. During the dry season, frogs were found primarily in mature forest where they occupied retreat sites in palm bracts, under decaying wood, and in tree holes. These retreat sites were used collectively by the frogs, as also is the case in the sister species, D. auratus. Retreat sites also were used as sites for tadpole deposition. Although tadpoles are known to be cannibalistic, we found five of them together in a water-filled palm bract.
Not only did frogs reduce their activity when rainfall decreased, they also consumed fewer prey and a lower diversity of prey items during the dry season. During the dry season, the diet shifted towards a reduction in the consumption of wasps and insect larvae, and more commonly contained termites. Ants were the most common prey items during wet and dry season. Our results show that during the wet season, Dendrobates tinctorius opportunistically colonizes recently formed tree-fall gaps and individual frogs stayed there for only a few weeks.
Male Dendrobates tinctorius did not establish territories that lasted for the entire rainy season, in contrast to the behavior of most other species of dart-poison frogs."
If you keep this species, give them a rest at least once a year - a cooler, drier period which matches their natural environment.