Yellow Heart-tongued Frog

Fascinating facts about the Yellow Heart-tongued Frog

• The yellow heart-tongued frog has been observed at elevations up to 650 m.
• The frog lives on bromeliads, and each female deposits only a few eggs per clutch, spreading them across multiple plants.
• Its range is limited to Brazil’s Atlantic forest and the caatinga scrub, and despite habitat loss, the frog isn’t classified as endangered.

At a glance

About the Yellow Heart-tongued Frog

The yellow heart-tongued frog, Phyllodytes luteolus, is a diminutive hylid that flits among the mist-laden bromeliads of Brazil’s Atlantic forest and the drier caatinga patches that fringe it. Its name hints at the vivid, lemon-yellow hue that stains the undersides of its tongue, a flash of color that becomes visible when the frog snaps its mouth shut to capture tiny insects. Adults cling to the water-filled leaf axils of bromeliads, where they sip the micro-fauna that drift in the miniature pools, and they are equally at home on the forest floor up to 650 m above sea level. Females lay only a few eggs per clutch, spreading them across multiple bromeliads throughout the breeding season, a strategy that reduces the risk of total loss if a single plant is disturbed. A surprising trait for a forest dweller is its tolerance of secondary growth; unlike many of its congeners, this species can persist in degraded habitats, colonising the regrowing understory of cut-over forest and thereby maintaining a foothold even as its primary homes shrink. The frog’s life is a delicate balance of arboreal specialization and opportunistic resilience, a narrative that continues to unfold in Brazil’s changing landscapes

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