A couple of weeks ago we found a strange hole dug into our backyard, and not long after we found the culprit: Eastern Cottontail.
It took us another week to figure out what she was doing though. The hole was in fact a nest, and she was returning in the evening to feed the babies.
You can just make out the head and eye of one of the feeding young in the above photo.
We didn't disturb the nest too much, but we think there were five babies. According to the literature, the mother only feeds them twice a day. Our mother rabbit has consistently arrived for a feeding at about 5:30 p.m. for the past several evenings.
The nest is well-concealed despite the fact that it is situated in the open in the middle of the lawn. Before realizing it was a nest I ignorantly ran the lawn mower over it. Luckily no harm was done - I would have been traumatized if... well you know.