They eat ants too.
Wonderful little dragons, very very difficult to keep in captivity.
I know of only 2 or 3 keepers who have them in their collections and no one who has successfully bred them in captivity to date .
Thing is they are very particular about the ant species they will eat and the keeper has to maintain 3 or 4 viable and large captive iridomyrmex ants nests to keep these little dragons fed ( who will eat several thousand ants each day , every day , 365 days per year ).
NOT EASY to do if you are outside the natural range of these dragons.
I think Gosford Reptile Park and one or two other reptile parks ( one near Darwin , other near Cairns (?)) have some of them on display.
Melbourne Museum has some kept as captive live display animals too.
Range of Thorny Devils
https://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:fef067d7-658f-49ae-accb-c71fde230af0
The one's I've encountered when doing my 4x4 safaris have all been loners and they don't seem to fear humans ( likely never seen a human before me ) , you can literally walk up and pick them up , and they have an odd slow gate when walking .