As we know, melanism in some Vipera species is rather common (at least locally), but is this true for all species? For instance, I cant not find (with quick google search) any pictures or good information on melanistic V.ammodytes.
What other species does or do not have this trait in certain specimens/locations ?
Pictures is always nice.
Here is some pics from 2 norwegian melanisitic Vipera berus berus
Vipera berus berus by Thor Hakonsen, on Flickr
Vipera berus by Thor Hakonsen, on Flickr