North American Common Hippopotamus Population

Hi, I'm RhinoHippoElephantGiraffe, and this is my first ZooChat post. Here is a list of American zoos that have eliminated river hippo exhibits since 1990. Let me know if I missed any or I got one or more wrong.
Jackson Zoo - 1990
Cameron Park Zoo - 1993
Houston Zoo - 1995
Virginia Zoo - 1996
Oklahoma City Zoo - 1998
Maryland Zoo - 2001
Central Florida Zoo - 2003
Sacramento Zoo - 2004
Utah's Hogle Zoo - 2005
Fresno Chaffee Zoo - 2005
Riverbanks Zoo - 2008
Smithsonian's National Zoo - 2009
Detroit Zoo - 2011
Brookfield Zoo - 2012
Mesker Park Zoo - 2012
Oregon Zoo - 2018
Dickerson Park Zoo - 2020
Birmingham Zoo - 2020
San Francisco Zoo - 2021

Audubon Zoo - c. 2004 (not sure of precise year but shortly before Katrina)
 
Zoos I can see getting River Hippos that don't currently have them are:
- Houston Zoo
- Fresno Chaffee Zoo
- Reid Park Zoo
- Columbus Zoo
- Zoo Atlanta
- Seneca Park Zoo
- Phoenix Zoo
- Oregon Zoo
Houston and Fresno are likely candidates (though the African River project is still up in the air). Reid Park seemingly wants to go for river hippos, although publicly they've stated they wanted to go for pygmy hippos. Columbus is likely, Atlanta expanded their elephant habitat into the space originally meant for a Mzima Springs exhibit for hippos and crocodiles, Seneca Park doesn't have the room, Phoenix, I doubt (though stranger things have happened) and Oregon purposefully went OUT of hippos to expand their black rhino habitat.
 
Many Zoos either go the way of the Rhino (White or Black Rhinos) or Hippos so it’s a tough choice. And when they choose hippos they usually go Pygmy or River not many Zoos have both species plus rhinos. But lots of factors play roles so it’s always a tough one to say for the future. And the biggest factor being Money of course. Not many places are like San Diego that have Rhinos, Pygmy Hippos and Hippos.
 
Many Zoos either go the way of the Rhino (White or Black Rhinos) or Hippos so it’s a tough choice. And when they choose hippos they usually go Pygmy or River not many Zoos have both species plus rhinos. But lots of factors play roles so it’s always a tough one to say for the future. And the biggest factor being Money of course. Not many places are like San Diego that have Rhinos, Pygmy Hippos and Hippos.
If you take a look at the AZA planning the development of the river hippo SSP is rather stagnant. Quite a good number have ATM no breeding in mind. Would be nice to know what space exists and how this relates to space plans for pygmy hippo (on expansion).
 
0.1 Mara from L.A has officially been sent to Honolulu.

The Los Angeles Zoo are now without Hippos. They do plan to include them in a future African precinct, but time will tell whether they ever get them again.

The Honolulu Zoo says 'aloha' to Mara the Hippo, flown in from the LA Zoo
Another - a readable source to us Europeans - is:
Welcome, Mara the Hippo!

It specifically mentions 18 year old Mara will keep the resident river hippo Louise company. I really do deplore not more US/AZA zoos allow their river hippo to have breeding opportunities. It alll comes down to the current AZA program where most participating zoos have a no breeding recommendation unfortunately. This means the population is ageing and over time this might create an issue in zoos not being able to exhibit common or river hippo. Would be a shame for an essentially already threatened species.
 
Another - a readable source to us Europeans - is:
Welcome, Mara the Hippo!

It specifically mentions 18 year old Mara will keep the resident river hippo Louise company. I really do deplore not more US/AZA zoos allow their river hippo to have breeding opportunities. It alll comes down to the current AZA program where most participating zoos have a no breeding recommendation unfortunately. This means the population is ageing and over time this might create an issue in zoos not being able to exhibit common or river hippo. Would be a shame for an essentially already threatened species.

I understand your concerns. Mara did at least have a daughter, Rosie (now at Disney's Animal Kingdom to breed), during her time at the Los Angeles Zoo.
 
Another - a readable source to us Europeans - is:
Welcome, Mara the Hippo!

It specifically mentions 18 year old Mara will keep the resident river hippo Louise company. I really do deplore not more US/AZA zoos allow their river hippo to have breeding opportunities. It alll comes down to the current AZA program where most participating zoos have a no breeding recommendation unfortunately. This means the population is ageing and over time this might create an issue in zoos not being able to exhibit common or river hippo. Would be a shame for an essentially already threatened species.

Whilst Louise is from a well represented line, Mara is essentially genetically valuable, being the only surviving offspring of both parents. Honolulu do have a great, new enclosure so i'd like to see them maybe import a bull in the future.
 
Going back to 2021, these are the births/deaths/transfers of Common Hippopotamuses.

Births: The 3 births of 2021 were Omo at the Cheyenne Mountain Zoo, born to first time parents Biko and Zambezi on July 20th, Matilda at ABQ Biopark, born to Moe and Karen on July 21st, and Greta at Disney's Animal Kingdom, born to Henry and Tuma in June 2021.

Deaths: The only death in 2021 was 45 year-old Otis at the San Diego Zoo on November 15th, 2021. He was North America's last remaining wild-born River Hippo.

Transfers: Two transfers happened in 2021. First, on September 6th, Tucker moved from San Francisco Zoo to the Cincinnati Zoo, and on November 10th, Rosie moved from Los Angeles Zoo to Disney's Animal Kingdom.
 
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