From the Stan Winston School of Character Arts:

On December 18th, 2013, the Oscar-winning FX team from Amalgamated Dynamics Inc. (ADI) invited us to tag along as they brought Bernie the Gorilla from THE ZOOKEEPER to Hollywood to share the wonder of Practical Effects with tourists and movie fans. His face is animatronically controlled by four puppeteers with ADI co-founder Tom Woodruff Jr. inside the suit bringing the rest of him to life.

[Stan Winston School | Via Korben.info]