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T neotropical family Dendrobatidae includes nearly 200 species known as ‘poison frogs’ (Frost, 2020). Poison frogs lay their eggs in arboreal nests, e.g. leaves on bushes, leaf litter and phytotelmata (Grant et al., 2006; Lötters et al., 2007; Stynoski et al., 2015). After oviposition, the parents attend and take care of the eggs during development until the tadpoles hatch (Weygoldt, 1987; Grant et al., 2006). Once they hatch, the adult male or female will typically transport the tadpoles on their backs to a location where each tadpole will complete metamorphosis (Grant et al., 2006; Pyron & Wiens, 2011; Hime et al., 2020). For several dendrobatid species, information on phylogenetic relationships (e.g. Pyron & Wiens, 2011; Grant et al., 2017), ecology (Toft, 1995), natural history (Haddad & Martins, 1994), and behaviour (Hödl et al., 2004; Pašukonis et al., 2014) has been well-documented. However, detailed information on egg attendance and parental care is still scarce for most species. Here we describe our observations on egg attendance of an Amazonian species of poison frog, Ameerega hahneli (Boulenger, 1884). Between 14 and 19 May 2020, we monitored the egg attendance behaviour of a single male A. hahneli in a relictual forest in the municipality San José del Fragua, Caquetá, Colombia (1.352876, -75.971376, WGS84; 466 m a.s.l; Fig.1). We observed clutch attendance during the night using red light to reduce disturbance. On 14 May 2020 at 19:17 h, we observed a male of A. hahneli attending an egg mass, which was composed of 22 eggs containing tadpoles (Fig. 2A), deposited on the surface of a leaf at 50 cm above the ground. We captured the male to measure its body length The Herpetological Bulletin 153, 2020: 31-34

Egg attendance behaviour of an Amazonian poison frog Ameerega hahneli (Anura: Dendrobatidae)