Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Map showing localities sampled in this study. For each locality a color code indicates which form is present. Brown circle: lowland brown-headed brown form. Blue circle: highland polymorphic form with grey and brown morphs. Red circle: grey-headed brown form. Green circle: brown-naped brown form. Limits between monomorphic lowland forms are indicated with a hard line; limits between lowland forms and the highland polymorphic form are indicated by a dotted line.
