“The zoo animal in a cage exhibits all these abnormalities that we know so well from our human companions. Clearly, then, the city is not a concrete jungle, it is a human zoo.”
Desmond Morris (2009), The Human Zoo, p. vii
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Desmond Morris 14
English zoologist, ethologist and surrealist painter 1928Related quotes
“We're all zoo humans to some extent, even me.”
MovNat: Learning how to move as we were intended to, The Washington Post http://washingtonpost.com/lifestyle/wellness/movnat-learning-how-to-move-as-we-were-intended-to/2012/02/03/gIQABjNMRR_story.html?utm_term=.e68f6050d5d7_r=0

From the introduction to the published script.
A Zed and Two Noughts

The Best of Gene Wolfe (2009), afterword to "Petting Zoo", p. 432
Nonfiction
“Zoo: An excellent place to study the habits of human beings.”
Esar's Comic Dictionary

K. Elst : The Ayodhya Demolition: an Evaluation, in India., & Dasgupta, S. (1995). The Ayodhya reference: The Supreme Court judgement and commentaries.
1990s, The Ayodhya Demolition: an Evaluation (1995)

“.. the most dangerous animal in a zoo is Man.”
Variant: We commonly say in the trade that the most dangerous animal in a zoo is Man.
Source: Life of Pi

My Heart Will Always Be The B-Side To My Tongue (2004), Ultimate Guitar Interview (2008)

Source: The Varieties of Scientific Experience: A Personal View of the Search for God