Hi George,
I Have tried every plant under the sun, and as I house two parrots, they tend to munch everything.
However, I got hold of some anubias today, as i've not tried that. It's lasted more than a few hours, so has my respect. However, they do keep digging it up so i'd like to at least weigh it down to make it a bit harder for them...
Thanks,
Jee