Window feeders: Who do you see?

A few years ago I bought my first window feeder for a second floor window and treated my birds to some live mealworms to encourage them to use it, which of course they loved. I see mainly see tits, blackcaps, robins and sparrows.

Down in the garden on the other side of the house there are suet, peanut and sunflower heart feeders and various bits in a caged feeder on the ground for the blackbirds, etc.

Basically, my window feeder has created a spoiled generation of birds used to their live mealworms all year round and they look horrified if I fill it with a mix of sunflower hearts and kibbled peanuts.

I’d like a break from touching mealworms, for financial and obvious reasons. So my silly question is: What is your food of choice in your window feeder and who do you see using it? If it’s seeds, do they use it in addition to hanging feeders, or have you had to put something different in the window feeder to encourage them?

Thanks for any replies and happy birdwatching!

Laura