Why wasn't Radgast part of the Council of Elrond?

[lindil]

I suppose it could be argued that he could have sent out Elf riders to find the Brown Wizard, but the fact that he didn't might suggest that Tolkien's Grey Wanderer had lost faith in the powers of his fellow Maier. (With good reason, I might add.)

Lost Faith? But my good Birdland, Radagast's spreading of the message of 'send all news of the black riders to me at Isengard' saved his hindquarters!

Radagast had to a degree gone native, I acknowledge, but there is no reason to suspect he had become untrustworthy, if that were the case Saruman would have picked up on it and brought him onto his side.

Curious that R. never seems to have met Fangorn ["G. is the only wizard that really casres about trees..."].