I've no idea what huhu grubs are, but I've had alligator sausage (probably similar to croc) and ostrich. With the alligator it was too much sausage to tell what that was like, but I do like ostrich steak. Tastes like a very lean and tender steak of beef. More and better flavor than fillet mignon. Which, frankly, is over-rated.
I love squirrel, but never had the brains. I have, however, had lamb brains, and back when I was a youngster, Dad would make a calf brain salad. This was back late 60s early 70s prior to "mad Cow" - I wouldn't eat cow brains now - he'd cook them up, chill them down, serve with a viniagrette and capers. I liked them.
Hey, as a kid, if something wasn't cottage cheese, peas or brussels sprouts, I'd devour it. (I still feel the same way about cottage cheese.)