Schoener - p. 3 
In sagrei habitat shifts can occur without much color change. There 
are, however, morphological changes, as in number of toe lamellae. 
Grahami is morphologically similar throughout its range but very 
different in its structural habitat within Bermuda. Here, however, grahami 
is non-native, having been introduced rather recently (in 1905). It co- 
occurs in a small area of Bermuda with the still more recently introduced 
A. leachi a much larger species, Grahami occupies lower perches in the 
presence of the highly arboreal leachi, Here there is no phenotypic 
suggestion of genetic change; possibly this is a behavioral response to 
individuals of a larger and aggressive species. 
