Lunchtime Birdwatching

I took my new camera out to the Charles River for the first time yesterday. I was able to get out during lunch and I did my usual route, although had to turn around much sooner than I normally do since I was walking so slowly taking pictures.

The first picture of of what I believe is a Vireo, but I can't find any exact matches in my Sibley Guide or in images online. The closest match I found is a White-eyed Vireo. None of the pictures or drawings I've seen have the yellow marking on the crown.

Here's one of a Chickadee who was pretty animated hanging from this branch:

Here's a few of a Tufted Titmouse:

Can't wait to get out there again! Each time I learn a little more about using my camera and timing in catching birds.