Coal Tit Bird Facts: Food, Nest, Call (Plus Pictures) - NatureTrust
Coal Tit – Pembrokeshire Avifauna
Coal tit guide: how to identify, what they eat, and when they're seen in gardens - Discover Wildlife
Coal Tit Facts - Coal Tit Information
All About Coal Tits - Coal Tit Facts & Information – Awesome Wildlife Co
Coal Tit (Periparus ater) - British Birds - Woodland Trust
Coal Tit - eBird
Kensington Gardens and Hyde Park birds: Coal Tits on the lookout
Avifauna Supplement — Tits Shropshire Ornithological Society
Lifespan, lifetime reproductive performance and paternity loss of within-pair and extra-pair offspring in the coal tit Periparus ater