Postmortem analyzes were negative for chytrids and ranaviruses. Additionally, the animal had parasitic cysts due to trematodes in the liver provably non related with the edema. The edema syndrome is multifactorial, and metabolic origin is suspected in this case. Leer más.

Climatic adaptation played a significant role in driving diversification among European vipers. Cold-adapted and warm-adapted lineages presented similar climatic requirements and remarkable responses to Pleistocene stages, resulting in an intricate pattern of niche divergence along the phylogeny that favours local adaptation rather than PNC. Leer más