What Eight Days Can Do!

There are only eight day separating the upper and lower photos. With the time taken to get the images I’m glad to have auto focus and exposure on my camera. So, how do I know for sure this is a Song Sparrow nest?

An interesting fact about Song Sparrows, in times of plenty the male will feed the hatchlings while the female sits on another batch of eggs in a new nest. How’s that for a division of labour?