Marsh Tit (Poecile palustris) -> Willow Tit (Poecile palustris) - BirdID's Bird Guide - Nord University - Birdid
matt prior on Twitter: "Marsh Tit and Willow Tit ringed in woodland in North Wilts this morning. It's great for trainees to compare these species side by side. https://t.co/wjYzqry45y" / Twitter
Coal Tit (Periparus ater) -> Marsh Tit (Periparus ater) - BirdID's Bird Guide - Nord University - Birdid
Marvelous marsh tits - Leighton Moss - Leighton Moss - The RSPB Community