Ok I'm currently henless so now I sparrow watch and it's quite frantic on the nest building front here now. I saved some of henny hens donwny moulted feathers from last year (don't know why)and I put a handful out on the lawn. Swooped on before I could get back in the house they grab them several at a time so a beakful is bigger than the bird itself. Henny's legacy goes on and there are some snug downlined nests around here now. Wish I'd thought of it earlier.