The Savage Land Mutates were originally human inhabitants that were created by the mutant Magneto. They clash with the X-men and Ka-Zar on many occasions. On one occasion, they turned Spider-Man into the Man-Spider and Angel into a bird monster. They have came into conflict with the Avengers on occasions also. Although the group is fairly large they have only appeared with half of the group on each occasion they are seen. The entire group has never appeared together at one time.
The Savage Land Mutates were created by Roy Thomas and Neal Adams in 1969 and first appeared in X-Men # 62.