the.com/glass frog

a living window with a heartbeat you can literally watch beat.

means A small, translucent tree frog of Central and South America whose underside skin is so clear you can see its heart, liver, and other organs through it.

from A plain descriptive English name — "glass" for the see-through belly, "frog" for the obvious. The scientific family name, Centrolenidae, draws on Greek roots (kentron, a point or spur, plus a lens-like element), but the everyday name simply marvels at skin you can look right through.

see-through belly
Transparent skin reveals organs, bones, and beating heart
red blood hidden
Liver packs blood away to vanish while sleeping
dad duty
Males guard egg clutches from hungry wasps
tiny size
Many fit easily on a human fingertip
andes natives
Found in Central and South American rainforests
for instance

centrolene geckoideum — central american tree frog with transparent belly skin revealing eggs and organs, discovered 1973

hyalinobatrachium fleischmanni — glass frog in costa rica and panama whose eggs are visible through translucent skin on underside

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