I've got some big cedars in my front yard. 3 of them kinda form a triangle on ether side of my drive near garage. I have a pair of spaniels that have been laying in the gravel part of the drive for the last several days. Have to drive around them. Thought it was strange because they had never done it before. Yesterday I was walking back to the house from the shop and noticed all the birds singing. Several mocking birds and robins have nest in those cedars. Then all of a sudden a young bird fell out of a nest and they both jumped up and raced to it. My female got there first and gobbled it up.
So apparently that's why they have been out there. Just waiting for chicks to fall out. Makes since cause they are hunters.