"Tiny goldcrests, one of our smallest birds, rattled out a shimmering song of a very high frequency that sounded like an out of control sewing machine, " says Chris.
BBC: Llandegla Forest and the black grouse love dance
2.
In only two species, robins and goldcrests, was there no discernible difference in size between the spleens of those pounced on by cats and those killed in collisions.