in the vicinity of Rovinj (Istria, Croatia).
PDF-9407.pdf
These authors designate the border between the nomotypical subspecies and Vipera berus bosniensis
approx. as follows: Snežnik Mountain – Kapela Mountain – Varaždin.
A wide overlapping zone between the two subspecies can be found along this border.
Mario Schweiger wrote:But I'm wondering, why none of the reviewers saw this
Overlapping zone:
There are no biochemical data on the distribution of the ssp., as far as I know (at least none of
small scale distribution). But, by different people, for example both ssp. occur in Slovenia?
Rok Grzelj wrote:Just for the info...lowest finding of Vipera berus IN SW Slovenia is at Malinišče, Osilnica,
at 293 m.a.s.l... just some meters from the Croatian border.
Berislav Horvatic wrote:V. b. bosniensis lives in humid plains, at low altitudes, at most up to cca. 200 m a.s.l., while V. b. berus inhabits
mountains from cca. 1000 m a.s.l. and higher. They simply have no chance to come into contact with each other.
In Croatia you'll never find any V. berus at, say, 500 m a.s.l.
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