In my dictionary (my brain), reckless means causing trouble nonstop. But you should look it up for a more accurate answer.
Hope I helped!
Please show us the list you're referring to.
Mumble is an emperor penguin (i believe) that has a disorder that affects the shedding of his Down (the soft feathers that the young usually have)
1) How to install an Electric Timer
2) The Growing Tuberculosis Epidemic in Africa