I am very cautious about pulling anything from the wild that cannot be baked because captive birds lack the immunity of wild ones and such plants can harbor numerous diseases from birds, but also fungi, mold, parasites, insects etc...Plus, you don't know what kind of run-off they have been exposed to, and pesticides/salt runoff can be ingested by a bird if you give them plants that have been exposed to nasty soil (nothing from the side of the road is considered safe, technically).