Unlike the eastern indigo, which is federally listed, our Texas indigo snakes are state listed as threatened, not federally listed. As such, the Endangered Species Act does not apply.
That does not mean that someone collecting or killing Texas indigos is no big deal - it is. (So is habitat protection for them, but that's another story.) When I saw Rachel's comment about 'hunting' indigos, I assumed what she then said she was doing - looking, not collecting. I guess 'hunting' is a pretty ambiguous word. But as far as 'looking for them' and photographing go, I'm jealous of her opportunity. I'd love to see a wild indigo. I would not collect it, needless to say.