where newspapers
clump together
like wet feathers
yellow canary cabs
shuffle around corners
to other corners
well, you know the form. In a poem this short, every word has to be perfectly placed, and this stanza displays that you have an eye for structure and a mastery of language. In other words, this stanza stands out as probably the strongest, in image and in energy. The repetition of corners worked really well: you painted an image of endless corners, like the NYC I'm pretty sure you describe.
and pushpin hydrants
spray a fine mist
onto the sidewalk
this stanza is the weakest. you don't need 'and' in the first line, the second line is just awful compared to anything in the first stanza. Spray, fine, and mist? Its just too obvious and it lacks the quality of what you've written before. and onto the sidewalk just seems boring.
where newspapers
clump together
like wet feathers
i don't think you need the 'where' in the first line, otherwise I like how you come back to the bird image, that works really, really well.