Female Ruby-throated Hummingbird and Weigela blossoms

A few weeks ago I noticed a fair amount of activity around my feeder and a plain looking juvenile bird that determined to be a Brown-headed Cowbird.  I noticed this bird was hanging around the feeder and being tended to by a Song Sparrow.  I had always known about the predation of Cowbirds and songbirds but had never witnessed it.  It was certainly bizarre to see this small dedicated mother feeding this bird that was twice its size.  In the below photo you can see the sparrow’s beak deep in the Cowbirds throat.

During the beginning of August we camped at Port Burwell Provincial Park for the first time.  While we were at our campsite, we could hear constant chipping and peeping of what I suspected to be a small songbird.  We finally saw a small fluffy bundle of  feathers hopping amongst the litter in the forest.   Then we saw the mother flying to and fro with food.  I set up my camera with the flash since it was late in the day and it was fairly shaded at our site.   I was finally able to get some images of the baby and the mother feeding it.  It was quite a contrast to what I witnessed a week earlier. 

Male Ruby-throated Hummingbird

Song Sparrow feeding Brown-headed Cowbird juvenile

Female Yellow-rumped Warbler feeding juvenile