That's a cottontail, not sure if it's an Eastern (most common) or New England variety. In Connecticut they have litters from March to fall, normally 2-4 litters of 3-8 each. About 1/8th of the young survive till the next spring on average.
They eat primarily at night, and hide in dense brush during the day. The raspberries in my garden were providing them excellent cover it seems. More info here.
And the classic Duck Rabbit, Duck!