It has already begun, this march to spring. I have heard the first killdeer. It squealed at Baby Dog and me this morning as we walked across the stone parking lot at Roundtop. The birds nest among the stones, and by April tiny balls of miniature killdeer fluff will be scurrying, almost invisible, around the lot. It is too soon, today, for nesting to begin just yet, but I think the birds are beginning to stake out their territory.A friend is already reporting he is sick of the abbreviation FOY, which in electronic birding lingo means first of year. Birders reporting a new species seen in the current year frequently report the species is a FOY for them. March is the time when summer species begin to arrive. The killdeer was a FOY for me. I’m pretty sure I’ve already heard a FOY red-winged blackbird, but when I stopped to listen the call didn’t repeat so I didn’t record it.