Saw something very interesting on the farm this morning....we own a horse stables and during the winter months i dump the stall waste (you know what I'm talking about ) out behind the barn... normally i spread it on the fields , but once there is a couple of feet on snow on the ground the tractor will not do it... anyways...i started to re move the pile and circled around behind it on the south side where the sun would hit it in the morning and i see all these holes all over the pile... i figure its something looking for bugs or uneaten grain.. then i notice a little black head sticking out of one of the holes.... its a robin... then the hill erupts... must have been close to 100 birds sitting in each one of these holes!!!! i drive down the field and park the tractor and walk back up the hill in one of the fenced in pastures to see if they come back...one by one these robins return and climb back into their little borrows... even though the calendar says its spring it has been below freezing at night here and has not warmed up till after noon....my guess and its just a guess, is these little birds have figured out the manure pile heats up and dig these little hole to nest in at night... i have never seen anything like this before and go the biggest kick out of seeing the happen .