How does winter weather affect birdsong?
Despite the cold some birds can still be heard in winter but why do they keep singing when others fall quiet?
27 Dec 11:37 · BBC Weather
How does winter weather affect birdsong?
Despite the cold some birds can still be heard in winter but why do they keep singing when others fall quiet?
27 Dec 11:37 · BBC Weather
last updated on 28 Dec 05:24