|A Northern Mockingbird sings its little heart out. Photo by J.J. Meyer|
The noisy culprit is likely a Northern Mockingbird. It has a vocal repertoire of more than 400 songs and can imitate other birds, barking dogs and even musical instruments. Generally it's a male that sings all night, especially during the breeding season when it's trying to attract a mate.
His song fests will continue throughout the nesting season in order to defend it's territory and reinforce the pair bond with its mate. So if you have a resident mockingbird in your yard, the best you can do is close the window or buy earplugs, because the singing will not likely fade until July.