Giant Hogweed: poisonous, especially when it is exposed...

How about those toxic invasive plants? 

Giant Hogweed:

Giant hogweed has a phototoxic sap that, when exposed to light, can cause severe burns on human skin. Removing hogweed can be dangerous because of this sap; it should also not be burned or composted for this reason. The easiest way to remove giant hogweed is to pull it when it is still very young and small and store all plant components in sealed black garbage bags until the plant is dried and seeds are no longer viable. Do not plant giant hogweed in gardens and report any sightings.

Yes, do not allow it to take root. It must be removed completely, and not allowed to propagate. Of course, it becomes particularly toxic when exposed to the light.

Hm. I may have just enough variety of birds, bugs, and weeds. 

We'll see what my little brain cooks up.

C