I often talk to my siblings about potential ideas for wesen, and I've come up with many myself.
They are as follows:
1. Basilisk (we should really have a wesen which can turn people to stone by now) 2. Weasel (it could be immune to the effects of the basilisk and be its mortal enemy) 3. Yara-ma-yha-who (a wesen which could turn kehrsites into its own kind) 4. Butterfly and caterpillar (it could be a caterpillar as a teenager and mature into a butterfly by adulthood) 5. Falcon (we already have steinadlers, but then again, many wesen are based off of similar animals) 6. Chameleon 7. Shark 8. Dolphin 9. Cleaner shrimp 10. Elephant 11. Ant 12. Vampire (again, there are lebensaugers, but many wesen are similar) 13. Piranha (could reduce its victims to a skeleton in seconds) 14. Monkey 15. Gorilla 16. Kangaroo 17. Oppossum 18. Camel 19. Mantis 20. Cow (not bull, just cow) 21. Cricket 22. Gargoyle (something should inspire those creepy statues) 23. Parrot 24. Bald eagle 25. Snail 26. Salamander 27. Stingray 28. Anglerfish 29. Dryad (like naiads, but forest dwelling) 30. Cockroach 31. Chicken 32. Songbird 33. Whale 34. Skunk 35. Gazelle 36. Hercules beetle or stag beetle 37. Gray-crowned crane 38. Armadillo 39. Anteater (natural enemy to the ant) 40. Mole 41. Hedgehog 42. Axolotl
Please let me know if anyone has any other ideas or what they think of my own.