. 9? 90° 6S° BO' 75° 70* 65° 601 5S* Stf 4? 4<? 3? 30' 2S° Fig. 2.—semi-diagrammatic representation of the range of heliochera, a very distinct cotingine genus restricted to the forests of the humid temperate zone, which has pre- sumably been derived from a forest-inhabiting ancestor of the humid tropical zone at the base of the andes. the humid temperate zone forest, and hence the distribution of the genus, is doubtless less continuous than is here indicated.

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Photo credit: © The Bookworm Collection / Alamy / Afripics
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, bookyear1921