Lions at a Cambridgeshire zoo are being given old trees to play with as a post-Christmas treat.
Real Christmas trees are "like catnip" to lions, Linton Zoological Gardens' director Kim Simmons said.
The trees are used as toys by the big cats while others are used in the zoo's bio-burner to provide additional heating for the buildings.
People have been dropping off individual trees and a number of nurseries have donated unsold ones.
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