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The Descent of Man and Selection in Relation to Sex, Vol. II (1st Edition)

Note 210 — Chapter XV

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Mr. Salvin noticed in Guatemala (‘Ibis,’ 1864, p. 375) that humming-birds were much more unwilling to leave their nests during very hot weather, when the sun was shining brightly, than during cool, cloudy, or rainy weather.

Explore with AITake your curiosity a little further.

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