Kenku

Kenku are an avian race of the Forgotten Realms. They resemble anthropomorphic crows. Long ago, the Kenku served a master whose name has been lost to memory. They soared on wings he had given them, performing services silently in his name. However, they coveted his speech and stole the secret of language from his library, and took this newfound ability to beg and cajole for money. When their master found out they knew his wrath and he stripped them of their wings, voices and creativity then cast them down so that they would forever beg in penance for their greed.

Kenku cannot speak their own words. Only mimic sounds they hear. Also, above all other things, they yearn to fly. Kenku are master forgerers and are usually thieves or vagrants.