A first sign of spring

Yesterday I was strolling through Shooks Run Park with my greyhound, Stella, and saw the classic harbinger of spring, the Robin.
Now, I know Robins stick around all winter. They don't migrate to distant climes like our resident hummingbirds and hermit thrushes, but I also know that I almost never notice them until spring, when they pair up and make their beautiful dawn serenades.
So, I took it as a sure sign of warming that I saw two robins in a Chinese elm tree, enjoying the afternoon sun, perhaps contemplating the first steps of pairing to build a nest.
We'll keep our eyes open for other small signs of the end of winter as the weeks go by.