The film includes images of a barn owl, phesants, and coal tits
A Llanidloes-based wildlife film-maker has braved sub-zero temperatures in Powys to study how wildlife manage in such cold conditions.
Alex Sally captured the recent 'Big Freeze' on film when he made his film on 1 December 2010 as the temperature plummeted to -18 degrees Celsius.
The 37-year-old wanted to highlight the importance of feeding birds during harsh weather.
It is one of a series of films he has posted for free on the internet.
Alex said: "Making a film at nearly -20 degrees Celsius posed a lot of problems.
"The cameras didn't function too well at that temperature and to be honest neither do I."
The film was made at a temperature of -20 degrees Celsius
"I wanted to capture in film and photograph some our resident wildlife and how they manage in such low temperatures.
"It's a reminder of how important feeding the birds is in this weather and I show some tips on attracting unusual birds to your garden."
Among the birds captured on his film,
, shot in Llangurig are a barn owl, pheasants and coal tits looking for food.
Alex said: "One idea was to freeze the action with high speed photography.
"It turned out to be a lot harder than I thought and I ended up taking over 2000 shots to get the one I wanted."