Abundant resident.

Great Tits are birds of deciduous woodland. In more recent times they have spread widely from the woods into farmland, parkland and gardens. Their numbers fluctuate and they are vulnerable in severe winters. They were confirmed as breeding in every tetrad covering Stevenage in all three Breeding Atlases.

The 2012 Winter Atlas confirmed their presence from all 11 of the tetrads covering Stevenage.

The Common Bird Census at Watery Grove recorded them annually as holding between two and ten breeding territories. They are also associated with the Oaks in the wood, and their population was unaffected by coppicing. 

Great Tits are known for nesting in unusual places, in 1977 a pair raised a brood at Astonbury in a concrete garden gnome, the shoulder of which was broken off and the nest and young were visible inside. In 1989 a pair nested inside one of the posts supporting the Windsor Close road sign.

96 were ringed in Box Wood in 1980.

A flock of 34 was seen at an unrecorded location on 2 November 2024.