I found this elegant weed under the bird feeder. It is probably either from bird food or from bird droppings. Looks nice, anyway. I want to save it. Anyone knows what is it? Thanks.
Euphorbia dentata - this is the second Euphorbia birds bring me. The first was Euphorbia myrsinites which grows just a step from this new one. Not counting Euphorbia prostrata growing everywhere. Looks like birds adore spurges. Thanks, tipularia!
Probably from somewhere else - Euphorbia seeds are toxic, I'd doubt that birds eat them much if at all.
Toxic to animals, but probably not to birds. Lots of sources indicate birds as major distributors of euphorbias. This, for example: The American Midland Naturalist 154(2):342-357. 2005 http://www.bioone.org/doi/abs/10.1674/0003-0031(2005)154[0342:DOLSEE]2.0.CO;2