A lost nest

Today I found this beautifully formed perfect little nest on the pavement in La Garriga. I'm not sure what bird would have made it and whether it is from this year or whether it is an old nest. The only trees it can have fallen from are quite high so there was no chance to really see where it had come from. It is amazing to see close up how much work birds put into building their nests. This one had been lined with pine needles.