Ibis

 I probably saw more new and old birds today than any other day. Ibises, herons, egrets. Many songbirds, including what I thought was an indigo bunting. Several species I couldn't identify. Wrens or mockingbirds? Summer tanager?  Numerous sparrows. 

A new bird-feeder bird, a nuthatch. 

I'm guessing it is because it Spring and variety and populations are near their high point.