Oregon Zoo
Oregon Zoo | |
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![]() Main entrance in January 2024. | |
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45°30′30″N 122°42′53″W / 45.50833°N 122.71472°W | |
Date opened | 1888 |
Location | Washington Park, Portland, Oregon, United States |
Land area | 64 acres (26 ha)[1] |
No. of animals | 1,800[1] |
No. of species | 232[1] |
Annual visitors | 1.7 million[2] |
Memberships | AZA[3] WAZA[4] |
Major exhibits | The Great Northwest, Africa Savanna, Africa Rainforest, Elephant Lands |
Website | www |
The Oregon Zoo, originally the Portland Zoo and later the Washington Park Zoo,[5][6] is a zoo located in Washington Park, Portland, Oregon, approximately 2 miles (3.2 km) southwest of downtown Portland. Founded in 1888, it is the oldest zoo west of the Mississippi River.[7]
The 64-acre (26 ha) zoo is owned by the regional Metro government. It currently holds more than 1,800 animals of more than 230 species, including 19 endangered species and 9 threatened species.[1] The zoo also boasts an extensive plant collection throughout its animal exhibits and specialized gardens.[8] The zoo also operates and maintains the 2 ft 6 in (762 mm) narrow-gauge Washington Park & Zoo Railway that previously connected to the International Rose Test Garden inside the park, but currently runs only within the zoo.
The Oregon Zoo is Oregon's largest paid and arguably most popular visitor attraction, with more than 1.7 million visitors in 2018.[2] The zoo is a member of the Association of Zoos and Aquariums, and the World Association of Zoos and Aquariums.[4]
History
[edit]Founding
[edit]
The Oregon Zoo was founded in 1888,[5] making it the oldest North American zoo west of the Mississippi.[7] It all began with two bears purchased by Richard Knight – one brown bear and one grizzly.[9][10] A former seaman turned pharmacist, Knight began collecting animals from his seafaring friends. He kept his collection in the back of his drug store on Third & Morrison streets. When caring for the animals became too large a responsibility he sought to sell them to the city of Portland. Instead of buying the animals, the city offered to give Knight two circus cages and allowed him to place the caged bears on the grounds of City Park (now called Washington Park).[9]
Care and feeding of the bears, however, still fell to the Knight family and friends. It was not long before Knight addressed the city council again regarding the bears. Just five months later, he offered to donate the bears, along with their cages, to the city. Portland City Council accepted his offer[9] on November 7, 1888, and thus began the Portland Zoo.[5] Located in Washington Park, it was sometimes referred to as the Washington Park Zoo.[11][12]
By 1894, there were over 300 animals in the zoo’s collection. In 1925, the zoo moved to the site of the present Portland Japanese Garden, still within Washington Park.
Hoyt Park
[edit]The zoo moved again in 1958–59 to its current site, designed by Lawrence, Tucker & Wallmann.[13] This was located in Hoyt Park, west of Washington Park,[14] but some years later the two parks were combined as Washington Park. At this time, the Portland Zoo Railway was constructed to connect the zoo to its former site in Washington Park and other attractions there. The zoo's move to the new, much larger site was made in stages, over more than a year, with the first animals being moved in spring 1958 and limited public access being opened in June 1958, one day after the first section of the Zoo Railway opened.[15] During the transition period the new zoo was only open on weekends, as most animals were still at the old site awaiting completion of their new enclosures.[16] However, the new railway operated six days a week until mid-September. Meanwhile, the old zoo remained in operation, but in May 1959 was restricted to pedestrian access only, closed to automobile access, for its last months of operation.[17]
Washington Park
[edit]
The zoo at its current site opened on July 3, 1959.[18] It was renamed the Portland Zoological Gardens at that time,[5] but remained commonly known as the Portland Zoo. The elephants and big cats were not moved to the new zoo until November.[19][20] A new interchange was constructed on the adjacent freeway, the Sunset Highway, for better access to the new zoo.[21]
Elephants
[edit]The zoo rose it popularity locally in 1953, when Rosy the Asian elephant was acquired. The zoo became world-famous in 1962 when the Asian elephant "Packy" was born. He was the first elephant born in the Western Hemisphere in 44 years and was (as of 2010) the tallest Asian elephant in the United States at 10.5 ft (3.2 m) tall. A total of 28 more calves have been born at the Oregon Zoo, including seven sired by Packy (two of which, Shine and Rama, remained at the zoo), making it the most successful zoo elephant breeding program in the world. On August 23, 2008, Rose-Tu, the granddaughter of the zoo's first elephant Rosy, gave birth to a son named Samudra. The birth made Samudra the first third-generation captive-born elephant in North America.[22]
Attendance in 1962, the year Packy was born, was 1.2 million people.[23] Over the next several years, the number of animals declined, from 450 (representing 150 species) in 1962 to 386 (representing 123 species) in 1976, and annual attendance also declining over the same period, reaching its lowest point in 1975, with 448,198 visitors.[23]
On February 9, 2017, Oregon Zoo staff decided to euthanize Packy after a long struggle with drug-resistant tuberculosis. He was laid to rest at an unidentified city-owned "wooded, grassy area" that is not open to the public.[24] At the time of his death, Packy was 54 years old.
Metropolitan Service District
[edit]
Until 1971, the zoo was operated by the City, and then by the Portland Zoological Society under contract to the City.[5][25][26] In 1976, area voters approved a tax levy plan under which the zoo was taken over by the Metropolitan Service District (or MSD, now known as Metro).[27] Ownership of the zoo passed to Metro on July 1, 1976. Metro has continued expansion projects, aided by donors, sponsors and volunteers.[5]
Later in 1976, MSD renamed the zoo the Washington Park Zoo[5] after a naming contest.[12] The railway was renamed the Washington Park and Zoo Railway two years later. The decline in attendance seen in the 1960s and 1970s eventually began to reverse, and the zoo recorded 752,632 visitors in 1984 and 897,189 in 1986.[28]
Oregon Zoo
[edit]
The Metro Council changed the zoo's name from the Washington Park Zoo to the Oregon Zoo in April 1998.[6] In September of that year, the zoo became accessible by the region's MAX light rail system, with the opening of a Westside MAX line featuring an underground Washington Park station.[29] In 2003, the zoo began participation in a California condor recovery program started by San Diego Wild Animal Park and Los Angeles Zoo. The program is designed to breed California condors to be released into the wild and save them from extinction.[30]
In November 2008, regional voters approved a $125 million bond measure to improve infrastructure, enhance older exhibits and increase access to conservation education and the degree of sustainability.[31] Attendance at the zoo reached a record 1.6 million visitors for their 2008 to 2009 year.[32] The record was due in part to the birth of another baby elephant.[32] A new record was set the following year with 1,612,359 people visiting the zoo.[33] The zoo again brought in more than 1.7 million visitors in 2018.[2]
Exhibits
[edit]Africa Savanna
[edit]
Predators of the Serengeti, a $6.8 million exhibit which opened in September 2009, expanded the Africa Savanna 2.5 acres (10,000 m2) into the site of the former Alaska Tundra exhibit which used to house: Muskoxen and Grizzly Bears.[34] The zoo previously had lions, but closed the exhibit in 1998 to build Steller Cove.[34] The three new lions come from zoos in California, Virginia and Wisconsin.[34]
Discovery Plaza
[edit]
The exhibit formerly contained a pair of Amur leopards with a 19 year old male named Boris being one of the oldest Amur leopards in captivity. Boris was euthanized on October 10, 2018 [35]
Great Northwest
[edit]
Black Bear Ridge has three black bears (two males and one female) added in April 2010 after the previous three had been euthanized for health reasons. Their names are Tuff, Dale, and Cubby.[36] A fourth, Takota, died in 2023 during a routine medical procedure.[37]
Primate Forest
[edit]The zoo housed the world's oldest Sumatran orangutan, Inji, who was humanely euthanized January 9, 2021 after keepers noticed her failing health.[38]
Public access
[edit]Parking at the Oregon Zoo costs $2 per hour, to a maximum of $8 per day.[39] The Washington Park light rail station provides regional public transit access to the Oregon Zoo. TriMet bus route 63-Washington Park no longer serves the zoo via Washington Park as of summer 2022.[40]
Conservation
[edit]
The Oregon Zoo collaborates with wildlife agencies and conservation organizations on recovery projects for imperiled species including California condors, western pond turtles, northern leopard frogs, Oregon silverspot butterflies and Taylor’s checkerspot butterflies.[41] The zoo manages a community science project to monitor the American pika[42] and was the first zoo in the world to successfully breed critically endangered Columbia Basin pygmy rabbits[43] and Oregon silverspot butterflies.[44]
In 2012 the Oregon Zoo became the first zoo to draw blood samples from polar bears without the use of anesthesia,[45] leading to the development of a groundbreaking polar bear conservation science program. The zoo has since partnered with the U.S. Geological Survey on polar bear diet,[46] energetics,[47] and movement studies.[48] In Borneo, the zoo supports elephant conservation by funding two ranger positions, and partners with Malaysian and Indonesian organizations to mitigate human-wildlife conflict and improve animal welfare for elephants and orangutans.[49]
California Condors
[edit]In 2001 the zoo joined the U.S. Fish and Wildlife Service’s California Condor Recovery Program.[50] California Condors are slow to reproduce, laying only one egg every one to two years.[51] In 2003 the first six condor breeding pairs were brought to the zoo's 52-acre Johnsson Center for Wildlife Conservation. As of 2019, 79 chicks have hatched, 56 Oregon Zoo-reared birds have gone out to field pens for release, and over 50 have been released into the wild.[52]
The zoo also manages community-based conservation education efforts, including the Non-Lead Hunting Education Program, to protect condors and other wildlife from lead poisoning, the greatest cause of wild condor mortality. Ingesting carcasses riddled with toxic lead fragments results in approximately 50 percent of known causes of condor deaths since 1992.[53]
Pacific Northwest Frogs and Turtles
[edit]From 1998 to 2012 the zoo partnered on a recovery effort for endangered Oregon spotted frogs, a candidate for listing under the federal Endangered Species Act,[54] and currently collaborates on a head-start and release program for northern leopard frogs.[55] Frog eggs are collected and hatched at the Oregon Zoo or the Cedar Creek Correction Center, which has partnered with the zoo since 2009.[56] Juvenile frogs are then released into the wild, with a goal of creating a self-sustaining population. The captive rearing project works in collaboration with regional zoos and aquariums to save Pacific Northwest frog species imperiled by loss of habitat, invasive predators and the deadly chytrid fungus, which has quickly spread from Africa to threaten amphibian populations worldwide.[57]
The Oregon Zoo's Western Pond Turtle Recovery Project has helped establish two new western pond turtle populations in the Columbia River Gorge, where invasive bullfrogs have driven the tiny species to the brink of extinction.[58] Infant pond turtles are collected and raised in the project lab at the zoo until they large enough to be safely released back into the wild. More than 1,500 turtles have been released in the Columbia Gorge since 1990, with a 95 percent annual survival rate.[59]
Butterflies
[edit]In 1999, at the request of the US Fish and Wildlife Service, the Oregon Zoo joined with Seattle's Woodland Park Zoo in an Oregon silverspot butterfly captive rearing program to save a species once found from California to British Columbia and now reduced to five isolated populations.[60] Around 2,000 butterflies have been raised from larvae and released each year at the Oregon coast. For this work the two zoos were jointly awarded the 2012 AZA North American Conservation Award.[61] In 2019, the Oregon Zoo successfully bred a captive silverspot butterfly for the first time in the world, producing in 269 viable offspring.[62]
Additionally, the zoo has partnered with the Coffee Creek Correctional Facility to train inmates who volunteer to help raise and care for the critically endangered Taylor's butterfly.[63] Habitat degradation due to invasive species, urban development and agriculture have reduced the Taylor's checkerspots' native habitat by 99 percent. The Taylor's checkerspot captive rearing project has raised and released over 28,000 butterflies.[64]
Borneo Elephants
[edit]Oregon Zoo’s Care and Conservation of Borneo Elephants program supports projects in Sabah, Malaysia, to reduce human-wildlife conflict, create safe travel corridors for elephants and other wildlife in degraded landscapes and provide care for injured or orphaned elephants.[65] The Zoo partners with Seratu Aatai to promote co-existence between people and elephants through research and educational outreach to local communities, government agencies, the palm oil industry and academics.[66]
In 2015 the Woodland Park Zoo, Houston Zoo, Oregon Zoo and HUTAN-KOCP founded the “Borneo Elephant Zoo Alliance” with the goal of ensuring long-term survival of the Bornean elephant in the wild.[67] The alliance focuses on enhancing scientific knowledge of elephant ecology and conservation status and reducing human-animal conflict in the Kinabatangan River area through community outreach, public policy, and use of technology. In recent years, Oregon Zoo’s work with HUTAN-KOCP has focused primarily on forest preservation and reforestation for the benefit of both elephants and orangutans.[68]
Incidents and controversies
[edit]On July 4, 1970, three intoxicated men broke into the zoo at night. One of them was killed by the zoo's two lions while he was showing off by lowering himself into their enclosure. The next night, one of the men broke into the zoo again and shot both of the lions.[69] The incident stirred a public outcry against the men, including the victim of the mauling[70] and sparked a wave of donations to replace the lions.[71]
In April 2000, Rose-Tu, a female elephant born at the zoo, was severely abused by her handler, resulting in 176 lacerations including puncture wounds allegedly due to the handler attempting to shove a bullhook into her anus. It was speculated that the trauma suffered by her as a result of this experience may have compromised her ability to raise calves.[72] The handler was dismissed by the zoo and sentenced to two years probation and 120 hours of community service, the most severe punishment allowed by state laws at the time. As fallout from this incident, Animal Legal Defense Fund authored the Rose-Tu law, signed by Governor John Kitzhaber in 2001.[73] The law made Oregon the first U.S. state to legally recognize the link between animal abuse and violence toward people, and increased the penalties for animal abuse.[74]
In December 2012, the Seattle Times brought to light that the new-born elephant Lily, sired by Tusko, a bull elephant on loan from the elephant rental company Have Trunk Will Travel, was contracted to be owned by the private company.[75] After widespread public outcry, the zoo raised funds to acquire both Tusko and Lily from Have Trunk Will Travel for $400,000 in February 2013.[76]
In May 2014, then-director Kim Smith and lead veterinarian Dr. Mitch Finnegan were dismissed by Metro, the agency governing the Zoo, over alleged lapses in protocols following the death of Kutai, a 20-year-old orangutan, during surgery.[77] After the Zoo protested the veterinarian's termination at Metro Council, he was rehired in July.[78]
In June 2014, six tamarin monkeys died two days after arriving at the zoo from Harvard's New England Primate Research Center. The incident, along with previous primate deaths in Massachusetts, prompted a USDA investigation of the Harvard center that had transported the monkeys.[79]
See also
[edit]- The Continuity of Life Forms, a mosaic by Portland architect and artist Willard Martin that was originally installed at the former entrance to the zoo in 1959, and was re-installed outside of the zoo's new education center in July 2016.
- Charles Frederic Swigert Jr. Memorial Fountain, also installed at the Oregon Zoo
- Rose-Tu, an Asian elephant
References
[edit]- ^ a b c d "About the Oregon Zoo". Oregon Zoo. Archived from the original on September 19, 2012. Retrieved December 25, 2015.
- ^ a b c Jaquiss, Nigel (February 13, 2019). "A Mysterious Aardvark Death Is Just One of a Number of New Questions About Management at the Oregon Zoo". Willamette Week. Archived from the original on January 14, 2024. Retrieved November 27, 2023.
- ^ "Currently Accredited Zoos and Aquariums". aza.org. AZA. Retrieved 13 August 2011.
- ^ a b "WAZA Members - WAZA". waza.org/. Archived from the original on 14 November 2021. Retrieved 15 December 2020.
- ^ a b c d e f g "History [of Oregon Zoo]". Oregon Zoo. Archived from the original on April 20, 2012. Retrieved April 11, 2012.
- ^ a b "Portland's zoo is now named Oregon Zoo". The Oregonian. April 25, 1998.
- ^ a b "The birth of the bond". Oregon Zoo. Archived from the original on May 19, 2012. Retrieved April 11, 2012.
- ^ "Botanical collection". Oregon Zoo. Archived from the original on 2021-12-13. Retrieved 2018-01-02.
- ^ a b c Goodall, Mary (March 16, 1958). "‘Patron Saint’ of Portland's Zoo Collected Animals, Birds at Drug Store Near Waterfront". The Sunday Oregonian, p. 41.
- ^ "More Attractions for the Menagerie: Two Bears to be Added to the Free Show on Morrison Street". The Morning Oregonian, May 17, 1888, p. 8.
- ^ "Dock Boss Finds Office Occupied by Young Deer: Washington Park Zoo in Line for Another Pet, but Loses Out by Very Narrowest of Margins". The Morning Oregonian, June 28, 1928, p. 16.
- ^ a b "Zoo contest prize taken by old name." The Oregonian, October 2, 1976, p. 1.
- ^ Snyder, Eugene E. (1991). Portland Potpourri. Portland, Oregon: Binford & Mort. pp. 73–79. ISBN 0-8323-0493-X.
- ^ Holm, Don (April 12, 1964). "Pittock Estate Needed to Complete Wondrous Park System". The Oregonian, pp. 40–41.
- ^ "Many See Zoo, Train". The Oregonian, June 9, 1958, p. 15.
- ^ "Russian Bears Inspect New Home at Zoo". The Oregonian, August 8, 1958, p. 26.
- ^ "Zoo Opening Pushed Back 2 to 4 Weeks". The Oregonian, May 27, 1959, p. 1.
- ^ Richards, Leverett G. (July 4, 1959). "Joy Reigns Supreme at West Hills Zoo As Wonders of New Park Are Unveiled". The Oregonian, p. 1.
- ^ "Balky Elephants Moved By Force to New Home". The Oregonian, November 4, 1959, p. 14.
- ^ "Move to New Zoo Set for Big Cats". The Oregonian, November 10, 1959, p. 19.
- ^ "Road to Open to New Zoo". The Oregonian, October 10, 1959, p. 5.
- ^ "Free the elephants! Problems plague the Oregon Zoo's pachyderms". Willamette Week. Archived from the original on 2005-02-17.
- ^ a b Richards, Leverett (March 25, 1976). "New director predicts bright spring look for Portland Zoo". The Oregonian. p. A21.
- ^ Acker, Lizzie (February 9, 2017). "Oregon Zoo employees, visitors mourn death of Packy, Portland's 54-year-old elephant". The Oregonian. Archived from the original on 26 April 2018. Retrieved 9 February 2017.
- ^ Sullivan, Ann (July 2, 1971). "Zoo's new director stresses education". The Oregonian, p. 26.
- ^ "Change at zoo". The Oregonian, October 21, 1978, p. A22. Editorial.
- ^ "Zoo plans expansion following levy approval". The Oregonian, May 27, 1976, p. C3.
- ^ Federman, Stan (January 7, 1987). "Zoo year 2nd-best at gate". The Oregonian. p. B2.
- ^ "Go west, young MAX" (September 9, 1998). The Oregonian (special section).
- ^ "Condor egg could herald return of giant". CNN. April 3, 2007. Archived from the original on April 8, 2007.
- ^ Siemers, Erik (November 14, 2008). "PCC, Zoo expect to face more robust bond market". Portland Business Journal. Retrieved 2009-09-24.
- ^ a b LaMarche, Bill (July 1, 2009). "Oregon Zoo's Baby Elephant Helps Smash Attendance Records". Zoo and Aquarium Visitor. Archived from the original on December 17, 2009. Retrieved 2009-09-24.
- ^ Mortenson, Eric (January 7, 2010). "Despite economy, Oregon Zoo sets attendance record with more than 1.6 million visitors". The Oregonian. Archived from the original on 15 January 2010. Retrieved 12 January 2010.
- ^ a b c Meunier, Andre (September 10, 2009). "The zoo's $6.8 million exhibit, which houses three lions, keeps the roar alive". The Oregonian. Archived from the original on 2009-10-05. Retrieved 2009-09-23.
- ^ "Elderly Amur leopard euthanized at Oregon Zoo". 11 October 2018. Archived from the original on 7 February 2019. Retrieved 6 February 2019.
- ^ Muldoon, Katy (April 29, 2010). "Three black bears find a home at the Oregon Zoo". oregonlive.com. The Oregonian. Archived from the original on 7 June 2011. Retrieved 29 April 2010.
- ^ In Loving Memory Of Takoda, 7 April 2023, archived from the original on 2023-04-08, retrieved 2023-04-07
- ^ Theen, Andrew (January 10, 2021). "Oregon Zoo euthanized Inji, perhaps the world's oldest orangutan". The Oregonian. Archived from the original on 2021-01-25. Retrieved 2021-03-29.
- ^ "Explore Washington Park". Washington Park Transportation Management Association. Archived from the original on November 12, 2020. Retrieved January 5, 2018.
- ^ "Bus Line 63-Washington Park". TriMet. Archived from the original on December 4, 2017. Retrieved January 5, 2018.
- ^ "Oregon Zoo welcomes in two new river otters". The News Guard. July 28, 2019. Archived from the original on July 28, 2019. Retrieved March 4, 2020.
- ^ "Puzzling Pikas: The Gorge's little-known residents". KOIN. February 21, 2020. Archived from the original on February 22, 2020. Retrieved March 4, 2020.
- ^ "Reviving endangered populations of the Columbia Basin pygmy rabbit". KATU. May 12, 2016. Archived from the original on April 8, 2023. Retrieved March 4, 2020.
- ^ "Oregon Zoo boasts first-ever breeding of endangered butterfly". The Oregonian. December 4, 2019. Archived from the original on December 5, 2019. Retrieved March 4, 2020.
- ^ "Oregon Zoo makes a medical breakthrough with polar bears". The Oregonian. January 10, 2019. Archived from the original on August 25, 2019. Retrieved March 4, 2020.
- ^ "How Climate Change Might Affect Polar Bears' Bodies". USGS: Science for a Changing World. April 20, 2016. Archived from the original on October 27, 2020. Retrieved March 4, 2020.
- ^ "Shrinking sea ice is creating an ecological trap for polar bears". Science Daily. February 25, 2020. Archived from the original on February 26, 2020. Retrieved March 4, 2020.
- ^ "Polar Bear's Collar Captures Video, Clues About Climate Change". ABC News. July 31, 2013. Archived from the original on January 31, 2022. Retrieved March 4, 2020.
- ^ Nathan, Sen (January 29, 2019). "Removing Chendra from Oregon Zoo won't help her or Borneo elephants". The Oregonian. Archived from the original on May 28, 2022. Retrieved March 4, 2020.
- ^ "Oregon Zoo joins Fish and Wildlife Service's California condor captive breeding program". US Fish and Wildlife Service: Conserving the Nature of America. October 19, 2001.
- ^ "Oregon Zoo Welcomes First California Condor Chick Of The Year". OPB. March 20, 2020. Archived from the original on September 17, 2021. Retrieved September 17, 2021.
- ^ "Officials tout plan to bring California condors back to Pacific Northwest". KATU. May 7, 2019. Archived from the original on May 8, 2019. Retrieved March 4, 2020.
- ^ "Proposed Changes To ESA Could Have Consequences For Condors". OPB News. September 7, 2018. Archived from the original on August 8, 2020. Retrieved March 4, 2020.
- ^ "Oregon Zoo researcher works to unravel the mystery of the Superfrog". The Oregonian. January 10, 2019. Archived from the original on January 27, 2022. Retrieved March 4, 2020.
- ^ "Federal and State wildlife agency partnership aims for rebound of endangered Northern Leopard Frogs in Washington". Washington Department of Fish and Wildlife. August 13, 2019. Archived from the original on November 21, 2019. Retrieved March 4, 2020.
- ^ "Frog Project Receives Grant from Oregon Zoo Foundation". Sustainability in Prisons Project. April 20, 2010. Archived from the original on September 17, 2021. Retrieved September 17, 2021.
- ^ "Oregon Zoo releases endangered frogs into the wild". KGW8. September 17, 2009. Archived from the original on September 17, 2021. Retrieved September 17, 2021.
- ^ "Oregon Zoo's effort to repopulate western pond turtles". KGW8. December 6, 2019. Archived from the original on December 7, 2019. Retrieved March 4, 2020.
- ^ "Oregon Zoo releases 23 endangered turtles into Gorge". KOIN 6. July 31, 2020.
- ^ "Oregon Silverspot Butterfly". Oregon Fish and Wildlife Office. Archived from the original on 2021-09-17. Retrieved 2021-09-17.
- ^ "North American Conservation Award". Association of American Zoos and Aquariums. Archived from the original on 2021-09-17. Retrieved 2021-09-17.
- ^ "Oregon Zoo breeds rare silverspot butterfly in captivity". KGW 8. December 4, 2019. Archived from the original on September 17, 2021. Retrieved September 17, 2021.
- ^ "Coffee Creek inmates help raise nearly 750 endangered butterflies". Fox 12 Oregon. April 1, 2020.
- ^ "The Oregon Zoo Plans to Release a Record Number of Endangered Butterflies Into the Wild This Month". Willamette Week. March 9, 2019. Archived from the original on September 17, 2021. Retrieved September 17, 2021.
- ^ "Zoo teams up with wildlife rangers to help elephants in Borneo". Zoo News. 7 November 2018. Archived from the original on 15 November 2021. Retrieved 15 November 2021.
- ^ "Living together with elephants: A Q&A with Farina Othman". Zoo News. 27 January 2021. Archived from the original on 15 November 2021. Retrieved 15 November 2021.
- ^ "Borneo's elephants get a helping hand from new zoo alliance". Woodland Park Zoo Blog. 21 January 2016. Archived from the original on 15 November 2021. Retrieved 15 November 2021.
- ^ "Hutan: About Us". Hutan. Archived from the original on 15 November 2021. Retrieved 15 November 2021.
- ^ "Ken Bowers can't escape this dream". Portland Tribune. 13 May 2015. Archived from the original on 2018-01-03. Retrieved 2018-01-01.
- ^ "The Saga of a Man, Two Lions, and a Freak Accident That Got Freakier". Gizmodo. 22 July 2015. Archived from the original on 2018-01-03. Retrieved 2018-01-02.
- ^ "Spirit of '70". Portland Monthly. 20 April 2010. Archived from the original on 2018-01-03. Retrieved 2018-01-02.
- ^ "The lesson of Rose-Tu and her calf". Oregonian. 29 September 2008. Archived from the original on 2015-09-24. Retrieved 2014-10-19.
- ^ "Honoring Animal Victims: Landmarks in Legislation". ALDF. Archived from the original on 2014-10-13. Retrieved 2014-10-19.
- ^ "ORS 167.320". OregonLaws.org. Archived from the original on 2014-12-24. Retrieved 2014-12-23.
- ^ "Portland's baby elephant belongs to traveling show". Seattle Times. 4 December 2012. Retrieved 2018-01-02.
- ^ "Oregon Zoo pays $400,000 for elephants Lily and Tusko". Oregonian. 8 February 2013. Retrieved 2014-04-22.
- ^ "Metro: Dismissals at Oregon Zoo related to death of orangutan". KATU News. May 8, 2014. Retrieved October 30, 2020.
- ^ "Oregon Zoo brings back veterinarian fired over death of orangutan". The Oregonian. 10 January 2019. Retrieved 30 October 2020.
- ^ "US probes Harvard primate facility". Boston Globe. 11 April 2015. Archived from the original on 3 November 2020. Retrieved 30 October 2020.