I don't understand

ah - a 'survey'. I read half then got fed up. Willow tits rarely feed in gardens. The hint is in the name ;-). Pied wagtails have been feeding in our garden for 2/3 years, I feed live meal worms regularly as well as sunflower seeds and pea nuts. I don't know where the idea that 'blue tits are dominant' arrives from.

. We have had less of any species since the 1990s, I believe because more people across the area R putting out feeders.
Certainly greenfinches are on the decline due to a virus caused by dirty feeding stations.

. Our blue tits teach the young how to peck a small piece of nut - the adults take a piece and feed to the young, the next day they are helping themselves :-). A wren was having a bath in our pond yesterday morning. All the birds have been away for 5 weeks, moulting and resting after a busy year of nest building and hatching eggs. Not 1 on the feeders. I believe that they top up energy levels by using feeding stations = more young hatched.
Last week I did note blue tits round the curly hazelnut leaves where there are greenfly-type insects. With more areas being destroyed for housing, then I will continue to feed the birds and 🦔 s.
Climate change will alter issues. Apparently. As will HS2 and new builds and roads.
