Green Balloon Club S01E21 - Birds in Autumn

The Green Balloon Club team are having a good look at autumn - how the leaves change colour and whether it is possible to preserve their lovely shades.

Jelly pays a visit to Bill Oddie and finds out what's happening in his bird boxes at this time of year. Many birds migrate now, but Jay and the Ground Crew have a look at the ones that stay at home and find out how experts research their lives.

And Green Balloon Club members Annabelle and Jessica set one of the stay-at-home birds as the week's spot.