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The Bird 



climate, the birds, and in fact all of the animals, are of 

 a much lighter hue than those living in an atmosphere 

 of great humidity, where moisture does not readil}^ evapo- 



FiG. 234. — Male Scarlet Tanagers, showing niovilt from the scarlet summer dress, 

 (a), through the parti— coloured garb (6), into the green winter plumage (c). 



rate. In such a place birds tend to be very dark-coloured. 

 In the case of captive birds, I have seen White-throated 

 Sparrows and Wood Thrushes become almost like black- 



