Which is the best park to see a Slow Worm?
Snowdonia National Park
In Snowdonia National Park, United Kingdom, about 60% of wildlife watchers report a Slow Worm sighting on a given day, the highest of the 13 parks where we can rate it, from GBIF citizen-science data.
Where else can you see a Slow Worm?
Triglav National Park and more
After Snowdonia National Park, the next-best odds of seeing a Slow Worm are in Triglav National Park (Slovenia, about 50%), Plitvice Lakes National Park (Croatia, about 50%) and Bavarian Forest National Park (Germany, about 40%).
When is the best time to see a Slow Worm?
It depends on the park
In the top parks, the best months are April and May in Snowdonia National Park (about 70%), May in Triglav National Park (about 70%) and May in Plitvice Lakes National Park (about 70%), as the share of wildlife watchers who report a Slow Worm on a given day. Each park's Slow Worm page has the full month-by-month chart.