Betta persephone is the one in my avatar.
There's around 70 species of wild bettas and their care levels vary. I get most of mine through Jodi-Lea, a couple came from the wholesaler Aquarium Industries.
The ones in this thread and in my display picture are probably the hardest to keep. You need to have really soft, acidic water (most people use rainwater but Melbourne tap is really soft) with a pH of around 5 or below if you want them to spawn.
They can also be really shy. Mine are only friendly because they are either bred by me or because I spend a lot of time with them so they got used to me.
That's my display picture blown up