This is Tit and Tat, Tat being the one with the solid head, they are three weeks exactly and I have no clue what gender they might be. They are Swedish blues
Fair Isle Bird Observatory: the Warden's diary: Unlucky Duck.
Yellow-bellied Tit | Birds Korea Blog
Alan Boddington on Twitter: "Penduline Tit, Ring-Necked Duck,Cattle Egret & Marsh Harrier from a day out in Somerset with the Brandon Marsh volunteers today. Also on the day list were Glossy Ibis
Farm birds with a macaw and a tom-tit in a tree | Bogdani, Jacob | V&A Explore The Collections