OK, so they're not really mine, but there's a Mr. and Mrs. Sparrow that hang out outside my living room window quite a lot. And I feed them and they're pretty used to me being just on the other side of the window.
Today, I noticed them flying around with nesting material. Mrs. Sparrow left a big hunk of it on my window ledge so I'm hoping that they're gonna build their nest somewhere nearby. I'd love to be able to see it! I did some googling and it appears that they build nests anytime from January clear through to July! And will lay up to 4 seperate clutches in one season. Pretty impressive little birds! Explains why they're so numerous too.
So here's hoping that leaving the nesting stuff on my window ledge actually turns into something!