On Birding

Yesterday on my birding expedition to Central Park, I saw ruby-throated hummingbird, a yellow-crowned kinglet, a common yellowthroat, a northern mockingbird, and a flock of ruby-crowned kinglets. I am  wondering if it is finally time to start a bird list? You can definitely tell from the photos below that the common yellow throat and the northern mockingbird were quite cooperative subjects. The hummingbird and the kinglets, not so much.  

Ruby throated hummingbird

Yellow-crowned Kinglet

Common Yellowthroat

Northern Mockingbird

Ruby-crowned Kinglet