Figure
5. Geographic clines fitted for the hybrid index and divergent
phenotypic traits. Dashed-vertical lines showing the cline centers,
while the shaded area are the 95% confidence intervals for each cline.
A) Hybrid index and plumage brightness clines fitted for the S. c.
corvina and S. c. hicksii contact zone. B) Hybrid index and
morphometric traits clines fitted for the S. c. corvina andS. c. hicksii contact zone. C) Hybrid index and plumage
brightness clines fitted for the S. c. hoffmanni and S. c.
hicksii contact zone. D) Hybrid index and morphometric traits clines
fitted for the S. c. hoffmanni and S. c. hicksii contact
zone.
Table 1. Analyses of variance among subspecies for each of the
morphometric traits (Body mass, Beak size, Tarsus length, Wing length,
Tail length).