Drogon is one of the dragons born in the Dothraki Sea, along with Viserion and Rhaegal. He is named after Daenerys's late husband Khal Drogo. He is distinguishable by his black and red colored scales, and red-black wings. He is the largest and most aggressive of the three hatchlings.
(source GOT wiki)
Due to dragons having a strong connection to the Force he is able to communicate with Shawn with a form of emotional telepathy