Marshtits are birds mainly found in woodland. They are less social birds feeding on the ground more than most tits, taking insects and seeds, such as beech mast. They usually nest in deciduous trees, like willows or alders, but will sometimes use a box.
They start to breed in mid April and usually have 1-2 cltuches of 5-11 eggs a year.
This is a red list bird which is sadly been in decline over the last 20 years.