Tokara Leaf Warbler

Why in News?

Recently, Japan has officially identified a distinct bird species after 45 years, marking its first new bird discovery since the early 1980s.

• Scientific Name – Phylloscopus amamiensis.
• Common Name – Tokara Leaf Warbler.
• Genus – Phylloscopus.
• Family – Phylloscopidae (leaf warblers).
• Habitat & Distribution – Found exclusively in the Tokara Islands, Japan (endemic).

Features

• Size – Small songbird roughly 10–12 cm in length, weighing around 6–9 grams.
• Appearance – It is a "cryptic species," meaning it is nearly identical in appearance to Ijima’s Leaf Warbler (by sight alone) but clearly distinct based on DNA analyses.
  • Ijima’s leaf warbler (Phylloscopus ijimae) – A rare migratory songbird only found in the Izu Islands (endemic) south of Tokyo, Japan.
  • IUCN – Vulnerable.
• Colouration – Uniformly greyish crown (lacking darker or paler stripes), greener upperparts, and mainly whitish underparts with contrastingly pale yellow undertail-coverts.
• Beak – Pale orange lower mandible.
• Wings & Tail – Features narrow pale tips to the greater coverts, which form a thin, sometimes very indistinct, pale wing-bar.
• Song – Distinct vocalisation patterns; bird song analysis helped differentiate it from Ijima’s leaf warbler.

• Diet – Insectivorous.
• Nest Type – Globular nests built from bamboo leaves, tree leaves, lined with feathers, roots, and pine needles.
• Reproduction – Oviparous (egg‑laying).
• Risk – The bird is only known to breed on one island, making it vulnerable.
• Threats – Habitat loss, climate change and invasive species mean conservation is urgent.
• Status – Not yet formally assessed, but scientists recommend Vulnerable classification, like Ijima’s Leaf Warbler.

Quick Fact

Reference

1. Indian Express | Tokara Leaf Warbler
2. Novataxa | Tokara Leaf Warbler