What is "coal tit"

n. 1 One of the smallest birds of the tit family Paridae, (taxlink Periparus ater species noshow=1), with a black cap, white nape patch and greyish body with buff underparts. 2 (taxlink Periparus melanolophus species noshow=1), the similar (vern: black-crested tit).

The coal tit (Periparus ater) is a passerine bird in the tit family Paridae. It is a widespread and common resident breeder throughout temperate to subtropical Eurasia and northern Africa. The black-crested tit is now usually included in this species.