geography

Arctic Region and Arctic Council

The Arctic is a polar region located at the northernmost part of Earth.

8 Jul, 2020

BRAHMAPUTRA AND ITS TRIBUTARIES

About Brahmaputra River: The Brahmaputra called Yarlung

3 Jul, 2020
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    GOLDEN BIRDWING: INDIA’S LARGEST BUTTERFLY

    • With a wingspan of 194 mm, the female of the species is marginally larger than the southern birdwing (190 mm) that Brigadier William Harry Evans, a British military officer and lepidopterist, recorded in 1932.
    • But the male golden birdwing (Troides aeacus) is much smaller at 106 mm.
    • While the female golden birdwing was recorded from Didihat in Uttarakhand, the largest male was from the Wankhar Butterfly Museum in Shillong.
    • According to the authors, the only measurement used in the study of Lepidoptera is wingspan — a simple concept with various interpretations of the term.
    • The smallest butterly is the quaker (Neopithecops zalmora) with a wingspan of 18 mm and forewing length of a mere 8 mm.