Leave the log and take off the towel. Darts are diurnal, so need light in order to be active. I'd just tend to let him get used to it.
I've repeated this many times, but in the early 70's there was a movie, and somewhere I have the novel, probably by someone like Tom Robbins, or even Kurt VonGute, but I'm too lazy to even find the title in my library, about some Titan aliens from the moon of Saturn by that name. They "collected" a couple of earthlings, otherwise unassociated with each other and took them back to Titan and put them in what they had studied, and thought was their natural habitat, i.e. furniture from Sears. This confused couple ended up in this "habitat," and were barely getting aquainted, trying to figure out what the hell had happened to them, when a voice from above interrupted them: "ARE YOU BREEDING YET?"
I always think of this when any of my frogs seem shy.
-----
Patty
Pahsimeroi, Idaho
4 D. auratus blue
5 D. galactonotus pumpkin orange splash back
5 D. imitator
6 D. leucomelas
4 D. pumilio Bastimentos
4 D. fantasticus
4 P. terribilis
4 D. reticulatus
4 D. castaneoticus
2 D. azureus
4 P vittatus