When did Winterwatch Season 21 Episode 1 air?
Winterwatch Season 21 Episode 1 aired on February 18, 2025.


Live coverage as our wildlife faces up to the most challenging time of year.

Iolo Williams explores how animals seek refuge in winter by looking back at stories from Winterwatch and Autumnwatch. He begins in an old mine near Machynlleth, where he discovers insects sheltering from the weather. However, there is danger lurking in the shadows in the form of cave spiders, which will feast on small creatures that venture too close.
Direct answers for episode-level questions and details.
Winterwatch Season 21 Episode 1 aired on February 18, 2025.
This episode runs for approximately 29 minutes.
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