An animal trap comprising a trap ( 106, 102, 302 ) section having at least one moveable wall section ( 136, 228, 314 ), being moveable with respect to one or more other walls of the trap section to thereby alter the size of the trap section animal detection means ( 138, 242, 306 ) operable to detect the presence of an animal within the trap section and adapted to signal such a presence to control means, which control means is operable, upon receipt of said signal, to cause movement of the moveable wall section ( 136, 228, 314 ) and thus alter the size of the trap section.
