THE ANIMAL FILES

New Guinea Amau frog

Paedophryne amauensis

A frog call sounded like an insect hidden in the leaves.

The New Guinea Amau frog lives among damp forest-floor leaves. Tiny size and insect-like peeps helped keep it unnoticed until researchers traced the sound to its source near Amau village.[1]

Follow the evidence ↓
New Guinea Amau frog
Image: Rittmeyer EN, Allison A, Gründler MC, Thompson DK, Austin CC · Commons · CC BY 2.5
Habitat
Moist forest leaf litter[1]
Development
Direct development without a free-living tadpole[1]
Food
Small invertebrates[1]

Finding a voice in the litter

Researchers used sound direction to narrow down where the unfamiliar calls came from. Collecting small patches of litter exposed tiny hopping frogs. Acoustic clues supplied a route to an animal difficult to see.[1]

A young frog rather than a tadpole

The lifecycle lacks a free-living tadpole stage. Young hatch as small froglets resembling the adult body plan. This does not mean development has no earlier stages, only that those do not occur as a swimming tadpole outside the egg.[1]

Moisture matters at a small scale

A high surface-area-to-volume ratio makes water loss important for such a tiny animal. Damp litter provides the humid conditions associated with its terrestrial forest life, while small invertebrates supply food.[1]

A COMMON MIX-UP

Must every frog hatch into a swimming tadpole?

No. This species develops directly and emerges as a small froglet.[1]

TRY A LITTLE REASONING

Why could sound be more useful than eyesight in finding it?

Reveal the explanation

Calls reveal a hidden caller’s direction even when its small camouflaged body blends into leaf litter.[1]

Sources & editorial notes

Adapted and translated from the cited Wikipedia revisions, with source-linked reasoning. Image credit and licence are listed separately above.

Adapted and translated from Wikipedia contributors; exact revisions are linked below. CC BY-SA 4.0

  1. Wikipedia contributors — New Guinea Amau frog (fixed revision; adapted and translated)
  2. NCBI Taxonomy — Paedophryne amauensis (identity and classification)

Last fact check:

One discovery leads to another

Common toadA quiet night walk leads back to a crowded breeding pond.Bufo bufo ↗Cane toadA toad with a remarkably broad menu.Rhinella marina ↗American bullfrogA pond chorus is a moving social scene.Aquarana catesbeiana ↗