Tom and Karl help zoo's birthday celebrations.
Sunday marked the day that Zoo opened fifty years ago and huge crowds flocked to the zoo to help them commemorate the occasion.
Two of the zoo's guests on the day were U's duo Karl Duguid and Tom Lapslie, who helped start off the birthday celebrations before signing autographs for those in attendance.
From there, the U's pair headed to the tigers' enclosure - sponsored by Colchester United - to meet Igor and Anoushka, before going onto the elephants enclosure to get up close and personal, as they helped at feeding time.
Congratulations to Colchester Zoo on their big day!