Numerous animals are killed by zoos when they don’t sufficiently contribute to profits or fit into the facilities’ master plans. Animals may be killed because their genes are “overrepresented” in captive wildlife populations or to make room for younger animals who attract larger crowds. Animals may also fall victim to what the zoo industry refers to as “management euthanasia” if they have illnesses that zoos don’t want to spend money treating.
February 9 is World Zoothanasia Day

In 2018, alongside Dr. Marc Bekoff, Professor Emeritus of Ecology
and Evolutionary Biology at the University of Colorado, we declared
February 9 as World Zoothanasia Day. This annual day of
commemoration honors and raises awareness of the animals whose lives
are needlessly terminated by zoos.
Numerous animals are killed by zoos when they don’t sufficiently
contribute to profits or fit into the facilities’ master plans.
Animals may be killed because their genes are “overrepresented” in
captive wildlife populations or to make room for younger animals who
attract larger crowds. Animals may also fall victim to what the zoo
industry refers to as “management euthanasia” if they have illnesses
that zoos don’t want to spend money treating.
A victim of this senseless and cruel practice was an Asian elephant
named Packy, who was held captive at the Oregon Zoo. In 2017 Packy
was killed at the age of 54 despite showing no signs of discomfort
from his incurable tuberculosis. In a meeting before his execution,
a zoo staffer reportedly said, "How much is a 54-year-old bull worth
compared to a four-year-old reproductive calf?" The Oregon Zoo was
recently shamed as the fourth worst zoo in North America on our 2019
list of Ten Worst Zoos for Elephants.
In Europe, it is estimated that between 3,000 - 5,000 “surplus” zoo
inmates are killed every year. In 2014, the Copenhagen Zoo in
Denmark slaughtered four healthy lion cubs and a young male giraffe
named Marius. Marius was shot with a stun gun, and in a shockingly
callous public display, was fed to lions in front of children. The
zoo admitted that it kills between 20-30 animals every year.
Sweden’s Borås Djurpark zoo has killed nine lion cubs since 2012.
Paradoxically, The European Association of Zoos and Aquariums
explicitly recommends killing healthy animals in some species
breeding programs.
These abhorrent practices are the inescapable culmination of a
system in which wild animals are treated as property and have every
aspect of their lives controlled in order to provide humans with
entertainment. All animals who suffer in zoos have had their freedom
and lives stolen from them. The decision to physically end their
lives is the final chapter in the miserable story animals experience
in captivity.
We look forward to the day when zoos stop this exploitation and
transform into sanctuaries for needy animals to model respect and
dignity for all sentient beings.