Polar bears in zoos in the United States

Henry Vilas Zoo IMG 240..
© Unknown
CC BY 2.0

Polar bear under water...
© Unknown
CC BY-SA 2.5

Polar Bear floating.jpg
© en:User:Cburnett
CC-BY-SA-3.0

Polar bear P1482.jpeg
© EncMstr
CC-BY-SA-3.0

Ursus maritimus -Rio Gr..
© Robert Timmons
CC BY 2.0

Ursus maritimus -Rio Gr..
© Christopher Holden f..
CC BY-SA 2.0

PolarBear2 (1285875108)..
© Elizabeth from Lansi..
CC BY 2.0

Polar bears in cage, Po..
© Albert Henry Barnes
Public Domain

Local zoo opens doors t..
© Capt. Michael Greenb..
Public Domain

Polar Bear at the Natio..
© Smithsonian Institut..
Public Domain

Some Hot Summer in Denv..
© cogdogblog
CC0

"Beats the Arctic ..
© Harris & Ewing, ..
Public Domain

"Beats the Arctic ..
© Harris & Ewing, ..
Public Domain