I was trying to cut down the big thistles in this corner of the field, before they went to seed. A pair of redwinged blackbirds became very upset about it. I had scythed within 3 feet of the nest, when I spotted it with 3 eggs inside it. I took a detour and scythed down some of the biggest thistles that I could get to without getting near the nest. I've learned the hard way, that if I disturb too much of the area around the nest, the bird will abandon the nest. So I will just let this are go until the birds are done nesting. So before I retreated I quick set my tripod with my camera near the nest to see if she would return.