Is chorus of winter birdsong a herald of spring - or warning of climate crisis?

Spells of unseasonably mild weather are prompting species such as the skylark to burst into song December is not noted for birdsong in the UK, as most species are more concerned with finding food during the short hours of daylight than preparing for the breeding season to come. Yet during spells of unseasonably mild winter weather some will practice their sweet refrains.Over the past few weeks I've heard several species singing: not quite as forcefully as in the spring, but enough for me to take notice. Continue reading...