When we were mowing the grass recently, my daughter came across this bird in one of the rocky areas of the lawn. Fascinating. According to our (online) research, this bird is a killdeer. I love that Wikipedia states that the bird is "named onomatopoeically after its call." (When do you ever get to use a word like "onomatopoeically"?! Love it!)
Can you see the little eggs on the right side of the picture?
This mother bird was protecting her four eggs with an impressive display of determination/bravery/dedication.