Neighborhood Bird Chirping and Chirping and Chirping and Chirping…

There is a neighborhood bird that recently has been chirping its head off… even at 2am in the morning!!! He or she use to perch on the antenae on top of our house, but lately, I’ve noticed that it chirps on the tip of our neighbor’s 20+ foot tall Mediterranean Cypress.

Anyone know what this bird is?
[Update] A fellow Flickr user identified this bird as a Northern Mockingbird or Mimus polyglottos.

Below are photos and a video showing the bird’s chirping. (This was taken in Vallejo, CA (Northern San Francisco Bay Area) in early June 2012.)

Neighborhood Bird Collage