Two males photographed in situ. One typical N.n.helvetica and one possible helvetica/persa hybrid? |
Typical British form (N.n.helvetica) |
Persa phenotype. |
Two males photographed in situ. One typical N.n.helvetica and one possible helvetica/persa hybrid? |
Typical British form (N.n.helvetica) |
Persa phenotype. |