One of the joys about having a bird feeder full of seed in the garden is that you really do get some interesting stuff growing around it... This looks like a cereal crop of sorts?
Regardless, its gone, took the strimmer to it in an attempt to get the lawn under control. The annoying thing is that thanks to the birds I have grass growing everywhere I don't want it, but I've had to put grass seed down in a couple of other patches to repair the lawn! If only the birds could aim a bit better! :-)
