Bank Swallows

These little birds come to our home every year. Yesterday was the first day I have seen them (Apr. 14th, 2017) They nest in a bluebird house but after  they leave the bluebirds take over the house. It is a sure sign of Spring when they arrive.I call them Bank Swallows but there are other names that people call them like Sand Martins. Read about them at Wikipedia. https://en.wikipedia.org/wiki/Sand_martin

Taken in my back yard