Danny Delgado is the Black Bison Ranger.
He works at a flower shop, where he is very passionate about the flowers. He has a fear of heights which is shown when trying to retrieve the Giraffe Zord crystal after he knocked it out of Toxica's hand in the episode Predazord Awaken. Danny was the fourth Ranger to be recruited and had served as a Ranger for two months prior to Cole joining the team.
Danny is the strongest Wild Ranger physically, but deep inside is a peaceful man, with a sweet side and some childish quirks (like sleeping with a Teddy Bear). He is madly in love with a girl named Kendall, who works in the same flower shop as he, but he is too shy to tell her, and gets (even more) clumsy when she is nearby. Eventually, she found out that he was the Black Ranger, but decided that he needed to focus on his mission, and turned him down. When the Rangers disbanded, he and Max Cooper embarked on a global vacation, visiting different cities around the world.
While Cole was originally thought of as the only Wild Force Ranger who could understand the Wild Zords (a trait which Merrick also probably shared), Danny has been shown on more than one occasion to be able to understand the Bison Zord. Whether he can talk to anyone else's Zords remains unknown. Besides the Bison Zord, Danny also commands the Rhinoceros Zord and the Armadillo Zord.