03-02-2010, 01:11 AM
It is birds. I have seen them do it. They will look for seeds and chop off the tops of new plants. The best way is either start the seed inside until they are big enough to transplant or cover the starter seeds. I made a cover that goes over the plants. I used pvc for the frame and hot glued screen over it. I no longer have a problem with bugs or birds.