Mockingbirds frequently sing throughout the night.  If they live in your yard, chances are you often hear their nocturnal serenades. If so, this begs the question, why do mockingbirds sometimes sing almost continuously under the cloak of darkness? 

       Although both male and female mockingbirds sing, immature males are the ones that are the most insistent nocturnal songsters. This is especially true for those young males that have not found a mate. However, adult males that have lost their mates will also sing around the clock.  Although they often sing throughout the night, they are most vocal from midnight to 4 a.m.  The birds also vocalize more frequently on bright moonlit nights.

       Most of the nighttime serenades take place in the spring and summer; at times, they also sing at night during winter. However, they rarely sing in the dark during autumn.