Flowers attracting insects

Hello all,

I am new here and I'm sorry if this is the wrong forum. I was wondering what kind of plants would attract insects. I'm living in Germany, and I have a lot of flowers growing, but it seems the amount of insects around has completely dropped and it worries me. Is there specific types of flowers I should invest into? I'm trying to attract more garden birds and it seems to be a good way to go about it.

Thank you for any ideas you may have

Karmen Dougall