If you see a praying mantis on your humming bird feeder, you might consider intervening...
I never considered praying mantis a harmful invasive species, but if they are preying on humming birds I am going to reconsider that. I do not put up humming bird feeders, just to see the little guys who visit get their brains eaten while still alive.
A mantis is not cruel, it is an carnivorious insect and just eating anything it can catch. But I am not going to let them sit on my feeders and eat humming birds.
Popular Science: Can praying mantises eat humming birds?
Ok, you can draw all sorts of analogies and metaphors for this...
PJ Media: Who's the mantis and who is the humming bird?
If a mantis takes out the Geico Gecko...I would have less problem with that.