Peter Steffen / AFP - Getty Images
Gray langurs enjoy an ice bomb filled with fruit on July 16 at the Hanover Adventure Zoo in Germany. The country was in the grip of a heat wave with temperatures topping 90 degrees Fahrenheit (30 degrees Celsius).
Misha Japaridze / AP
A polar bear cub lies on artificial snow in Russia's Moscow Zoo on July 21. Temperature records were broken across central Russia during the summer heat wave.
Dani Pozo / AFP - Getty Images
A worker gives frozen fruit to elephants at Madrid's zoo in Spain to cool off on July 7.
Charles Dharapak / AP
Naba, a 4-year-old African lioness, keeps cool by licking a "bloodsicle" made of frozen cow blood at the National Zoo in Washington on June 9, 2008. Zoos across the country use shade, water and every conceivable form of cooling machine to help animals, visitors and workers beat the heat every summer.
Robin Utrecht / AFP - Getty Images
A mandrill licks ice cream in a zoo in the Dutch city of Rhenen on Aug. 6, 2009. The animals in the zoo were treated to cold ice to cool them down amid temperatures near 85 degrees F (29 degrees C).
Annemarie Ferrie / Turtle Back Zoo via AP
An otter snacks on a "fishsicle" at the Turtle Back Zoo in West Orange, N.J.
Ernest Coleman / The Cincinnati Enquirer via AP
Chewie, a gorilla at the Cincinnati Zoo and Botanical Garden, samples a frozen treat on July 8.
Lui Kit Wong / The News Tribune via AP
Buckley, a 9-year-old beaver at Point Defiance Zoo in Tacoma, Wash., nibbles on a fruit, veggie and juice popsicle amid temperatures above 100 degrees Fahrenheit (38 degrees Celsius) on July 29, 2009.
Wu Hong / EPA
A rhesus monkey sucks on a frozen treat to stay cool at a zoo in the Chinese city of Qingdao on July 7. Summer weather sparked heat alerts in many parts of China, and Beijing recorded the highest temperatures for the first 10 days of July in 50 years.
Brian Kersey / AP
Children watch as a polar bear beats the heat with a swim at the Lincoln Park Zoo in Chicago on June 24, 2005.
Oli Scarff / Getty Images
An adult and baby meerkat cool down as they eat a watermelon given to them by their keepers at ZSL London Zoo on July 9.
Robert Vos / EPA
A chimpanzee enjoys a piece of ice filled with peanuts and fruit bites at Amersfoort Zoo in the Netherlands on July 1.
Sue Ogrocki / AP
Toba, a 34-year-old orangutan, has a frozen treat at the Oklahoma City Zoo on July 28, 2006.
Paulo Whitaker / Brazil Animals Society via Reuters
White-handed gibbons eat frozen fruits at the Sao Paulo Zoo in Brazil on Nov. 12, 2009.