Special quests

There seems to be special quests that pop up every now and again for a couple minutes. I saw one only one time, but it was a pretty good quest. I think it was something like gather 5 young brown warg claws for 20k exploration exp or so. No idea if that's what it really was since it was only there for a couple seconds, and I didn't get a good look. Just something to look out for.

Found 3 of them, all collection.

• Special Quest! Collect 5 Gold Forest Lizard Claws
  • Description
    • Special Quest! Collect 5 Gold Forest Lizard Claws.
  • 5100 exploration exp
  • 20000 Exp
  • 1148 Deposit
• Special Quest! Collect 5 White Forest Lizard Venom Sacs
  • Description
    • Special Quest! Collect 5 White Forest Lizard Venom Sacs.
  • 5110 exploration exp
  • 20000 Exp
  • 1150 Deposit
• Special Quest! Collect 5 Black Armadillo Claws
  • Description
    • Special Quest! Collect 5 Black Armadillo Claws.
  • 3500 Exploration Exp
  • 20000 Exp
  • 788 Deposit

Has anyone else actually seen these quests? When I compiled these lists I've never seen a single "Special Quest".

They are pretty rare. I see one maybe every 10 times I check, and I'm checking it every time I pass by it. I got some pictures of them for when I filled them out above because, when the quest board refreshes, they disappear. [1] [2] [3]