In general, zoos and wildlife parks preclude or severely restrict natural behavior, such as flying, swimming, running, hunting, climbing, scavenging, foraging, digging, exploring, and selecting a partner. The physical and mental frustrations of captivity often lead to abnormal, neurotic, and even self-destructive behavior, such as incessant pacing, swaying, head-bobbing, bar-biting, and self-mutilation.
In 2003 the UK government gave permission for the capture of 146 penguins from a British territory in the South Atlantic (Tristan da Cunha). Those who survived the seven-day boat journey from Tristan to a wildlife dealer in South Africa were sold to zoos in Asia.
In 2010, Zimbabwe planned to capture two of every mammal species found in Hwange National Park and send them to North Korean zoos. This included rhinos, lions, cheetahs, zebras and giraffes as well as two 18-month-old elephants. The plan was only stopped after international pressure by a coalition of organisations including CAPS – The Captive Animals’ Protection Society
70% of elephants in European zoos were taken from the wild.
A CAPS study found that 79% of all animals in UK aquariums were caught in the wild. Sea Life aquariums admitted to taking animals from the wild as recently as 2013, but refused to provide information on how many of the animals held by them were wild-caught.
HERE you can find some facts about the Zoos that may change your opinion about these places.