1 / 4   While people are preparing for the spookiest night of the year, animal residents at ZSL London Zoo were also getting in on the action, with zookeepers feeding the animals some Halloween-themed treats on Thursdays. /Chinanews Photo

2 / 4   ‍‍As part of the attraction’s “Boo at the Zoo” event, two Sumatran tigers, a group of Humboldt penguins, meerkats and squirrel monkeys feasted on their favorite food inside a carved pumpkins as their Halloween gifts. /Chinanews Photo

3 / 4   According to the zoo, the Halloween-themed event encouraged the captive animals to use skills they would need in the wild – like sniffing out their next meal and digging. /Chinanews Photo

4 / 4   A pair of Sumatran tigers enjoy the blood-scented pumpkins at the “Boo at the Zoo” event. /Chinanews Photo