I would really appreciate it if someone could identify this bird:

I saw him at the zoo - very energetic little bird, flying from branch to branch. Unfortunately I couldn't identify the species from the signs in front of the bird cage because they didn't have anything that looked like him on the chart. He looks like some kind of hornbill, from what I can gather from Google - perhaps Bradfield's hornbill?
Thank you!! 
Denise



