Later writings would reveal that the wizards are essentially minor gods, sent to the realm of mortals to help stop Sauron from doing Sauron shit. Of the set, most familiar to us is Gandalf the Grey, the friendly old man who loves the company of children. And of course there is Saruman the White, who is seduced by Sauron's sexy flaming eye and ends up betraying his cause. And a few nerds will remember Radagast the Brown, who is omitted from the film trilogy (although he is a major character in the Hobbit octet of films). But even in the novels, Radagast is barely mentioned. Later works explain that he basically doesn't involve himself in the events of The Lord of the Rings because he is just super busy with his squirrels and whatnot.
"Why, my precious creatures will starve if they don't lick all this acorn paste off my balls before winter comes."
But you have to have serious nerd-cred to know that there are two more wizards sent on the same mission, the so-called Blue Wizards, Alatar and Pallando. Although equivalent in power to the other wizards, they have no part to play in the events of The Lord of the Rings or any of the other works set in Middle-earth. Tolkien himself didn't seem to know much about what happens to these guys, essentially stating that they go far into the East and are never heard from again. Did they succeed? Fail? Did they ride any eagles or tell anyone they shall not pass?
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What animals did they form unnaturally close relationships with?