Penguinariums date back at least to 1968, when the Detroit Zoo opened the first in North America and possibly the world. The Detroit penguinarium is planning to expand in 2015 with a US $ 21 million overhaul funded in part by a US $10 million donation - the largest in the zoo's history - from a single donor. When completed, the penguinarium is expected to be 24,000-sq-ft.
- King, R.J. (June 2013). "A Really Cool Plan: Detroit Zoo unveils plan to build new $20-million penguin exhibit". Hour Magazine. Retrieved 16 September 2013.
- Domm, Robert W. (2009). Michigan Yesterday & Today. Voyageur Press. p. 102. ISBN 978-1-61673-138-0.
- "Detroit zoo floats plan for $21m 'Penguinarium' to open in 2015". The Guardian. Associated Press in Royal Oak. 18 September 2013. Retrieved 19 September 2013.
- "Bill Clinton Aims for a Birdie in the Canaries". Hello Magazine. 25 July 2005. Retrieved 19 September 2014.