Bird enthusiasts throughout California are enjoying the popular White-crowned Sparrows while they can, because by the end of the month the bulk of these birds are going to be heading north for Canada and Alaska, where they breed. Look below the fold to get a sense of when the White-crowned Sparrow migration will get started:

If you take a look at the latest eBird map for April 8, you can see that people are still seeing a lot of White-crowned Sparrows:

Just to get a sense of what the rest of April will look like, here's the map for the entire month of April last year:

If you look at the map from May 2012, you see the general emptying-out of White-crowned Sparrows across California taking place: