New neighbors gone already

A few days ago I posted a picture of a nest of cardinals that was in the bushes next to our house. A few days ago one of the chicks left the nest, leaving its sibling alone.

 Yesterday that chick left, and the nest was empty.

 This afternoon I found one of them was still hanging around in our shrubbery. It does not look much like a cardinal, but even though it is small, it can fly a bit, from twig to twig.

These baby birds sure grow up fast.

I had never seen a nest of cardinals before.