Hogle Zoo - Wikipedia
Vilas Zoo set to open Arctic Passage exhibit
Two Como Zoo polar bears set to leave
What's going on at the zoo?, MADISON MAGAZINE
The Zoo Review: February 2023
100 YEARS - Henry Vilas Zoo
Polar Bears thrive in Arctic Passage
Saint Louis Zoo unveils plans for 'Destination Discovery' exhibit
Highlights of the Arctic Passage exhibit
The Detroit Zoo has an adorable new polar bear to brighten your Monday
Henry Vilas Zoo - All You Need to Know BEFORE You Go (with Photos)