. Fig. 3.—semi-diagrammatic representation of the range of upucerthia, a genus of the tree- less SOUTH TEMPERATE ZONE, WHICH HAS EXTENDED ITS RANGE FROM PATAGONIA TO COLOMBIA OVER THE TREELESS PUNA OR PARAMO ZONE OF THE ANDES. COMPARE WITH MAP SHOWING RANGE OF THE GENUS HELIOCHERA, WHERE THE MARKED ENVIRONMENTAL DIFFERENCES BETWEEN TROPICAL AND TEMPERATE FORESTS, SEPARATED BY BUT FEW MILES, ARE BELIEVED TO HAVE RESULTED IN THE DEVEL- OPMENT OF THE DISTINCT TYPES CHARACTERIZING THE HUMID TEMPERATE ZONE, WHILE SPECIES OF THE PATAGONIAN PLAINS RANGE 4,000 MILES NORTHWARD OVER HIGH ANDEAN PLAINS W
. Fig. 3.—semi-diagrammatic representation of the range of upucerthia, a genus of the tree- less SOUTH TEMPERATE ZONE, WHICH HAS EXTENDED ITS RANGE FROM PATAGONIA TO COLOMBIA OVER THE TREELESS PUNA OR PARAMO ZONE OF THE ANDES. COMPARE WITH MAP SHOWING RANGE OF THE GENUS HELIOCHERA, WHERE THE MARKED ENVIRONMENTAL DIFFERENCES BETWEEN TROPICAL AND TEMPERATE FORESTS, SEPARATED BY BUT FEW MILES, ARE BELIEVED TO HAVE RESULTED IN THE DEVEL- OPMENT OF THE DISTINCT TYPES CHARACTERIZING THE HUMID TEMPERATE ZONE, WHILE SPECIES OF THE PATAGONIAN PLAINS RANGE 4,000 MILES NORTHWARD OVER HIGH ANDEAN PLAINS WITH ONLY SLIGHT DIFFERENTIATION.
Size: 1883px × 2654px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, bookyear1921
