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Why are humming birds not found …

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Why are humming birds not found in the polar regions?

    • Posted by Shreetam Mohapatra 5 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    ? ? 5 years, 4 months ago

    Because of their small size...due to small surface area by volume ratio the heat released is very high ....therfore in order to maintain their body temperature they have to spend a lot of metabolic energy which is not feasible for them.

    0Thank You

    ANSWER
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