The Oregon Zoo stays bright at night through the end of December thanks to the 20th annual edition of ZooLights.

The family tradition features nearly a million lights illuminating life-size animal silhouettes, trees, buildings, walkways and the zoo train.

"Every year, the zoo presents a stunning display of light and color," said zoo director Tony Vecchio. "I know many people in our community eagerly anticipate ZooLights and look forward to seeing the many new touches we add each year. It's so gratifying to know the Oregon Zoo has become an important holiday tradition to so many families."

New additions to the holiday event include displays featuring black bears, bobcats and babirusa pigs, which commemorate exhibits opened this year at the zoo.

 Video: Careful planning behind ZooLights

The zoo's popular costumed characters and elves will greet zoo visitors and pose for pictures. Rudolph the Red-Nosed Reindeer joins Buddy Beaver, Honey Bear, Eliza Elephant, Lulu Lemur, Nate the Eagle, Rock E. Goat, Sandy Sea Otter and Titus Tiger. Visitors can also see some of the zoo's resident animals, including mountain goats, elephants, primates, sheep and goats.

The sounds of the season will be heard in the zoo too, as more than 100 schools, churches and professional groups perform holiday musical selections, joined by several local dance troupes.

ZooLights is open through December 30th. Hours are 5 p.m. to 8 p.m. Sunday through Thursday and 5 p.m. to 8:30 p.m. on Fridays and Saturdays. ZooLights is closed on Christmas Eve and Christmas Day.