A shift in the morph ratio cline in the bananaquit on grenada, west indies

The two Bananaquit (Coerebaflaveolu) color morphs and the morph ratio cline on Grenada have been described in detail by Wunderle (198 1 a). The yellow morph is restricted to the dry northeastern and southwestern portions of the island. The melanic, or black morph, occurs throughout the island, but in lesser numbers in the northeast and southwest. Steep clines in the ratio of the two morphs exist in these areas and may be of recent origin. The observations of avian collectors in the late 1800s and early 1900s suggest that the yellow morph was exceedingly rare in Grenada.

JOSEPH M. WUNDERLE, JR, Condor 85:365-367