Having read a great deal of your different questions and answers re the spacing of bird boxes to allow for each species' required territories, I'm curious to find out whther there's an argument for simply providing the maximum number of potential nesting/roosting niches and leaving the birds to choose the spots they fancy? I have empty, clean paint cans, which, screwed to the fence, hidden away in the ivy, I thought might suit robins, and knowing they are extremely territorial, may only have room for maybe no more than 2. Old traditional hanging baskets, lined with coy and moss, I thought might make roosting/nesting hideaways for maybe wrens or long-tailed tits. And more traditional nesting boxes for hedge sparrows in another shrubbery with a nesting box colony up on the house wall for the house sparrows? We also have dunnocks which favour the dense foliage of the pampas grass and goldfinches who boldy build their nests in the privet hedge bounding a busy main road. I would love to make the hedges and shrubbery more finch friendly since their traditional local homes - the hedgerows that recently bounded 3 farms that have now disappeared under brick and concrete housing estates. We barely see the odd greenfinch, chaffinch or bullfinch, where they were abundant 5 years ago. I'd love to hear your opinions and learn from your expertise on my trying to make the most of every nesting opportunity, my garden can afford.