Tooth the breeding bull at the Wuppertal Zoo is stated to leave Wuppertal
"In recent months, zoo visitors have only been able to see the African elephant bull "Tooth" alone in one of the enclosures in the zoological garden of the city of Wuppertal.
Either the large male African elephant "Tooth" could be seen alone in the large outdoor area at the elephant house or alone in the smaller outdoor area, the so-called bull outdoor area, or alone in the bull indoor enclosure in the elephant house.
The African elephant bull "Tooth" has been in the Wuppertal Green Zoo since May 28, 2019. On this day, the then Wuppertal elephant breeding bull "Tusker" left the Wuppertal Zoo and traveled to the Ouwehands Dierenpark in Rhenen in the Netherlands. In return, the elephant bull "Tooth" moved from the Ouwehands Dierenpark Rhenen to the zoological garden of the city of Wuppertal.
"Tooth" mated two of the three adult African elephant cows in the Wuppertal Green Zoo. The Wuppertal African elephant cow "Tika" is expected to have offspring in autumn 2022 and the Wuppertal African elephant cow "Sabie" is expected to have offspring in the summer of 2023.
During a mating attempt with the Wuppertal elephant cow "Sweni" there was an incident at the time. As a result of this incident and other incidents involving younger elephants, the strong male elephant "Tooth" was separated and has only ever used one of the elephant enclosures allocated to him alone.
Zoo guests have been saying for some time that the African elephant bull "Tooth" will probably leave the Green Zoo in Wuppertal in 2022. The Nyíregyháza Zoo (Sóstó Zoo) in Hungary was discussed as a future location for "Tooth".
With the sale of the African elephant breeding bull "Tooth" there would be more freedom of movement in Wuppertal for the remaining herd of elephants and the two expected young animals.
In addition, the Grüner Zoo Wuppertal is planning a serious redesign and expansion of the current elephant area in the Wuppertal Zoo by 2031. Without breeding elephant bulls, there would be greater flexibility of use for the elephant areas then under conversion during the conversion phase."
I think this is a nice explanation to avoid having to say that they have to give the bull away since the enclosure is too small.
Minimum requirements in Germany since 2014:
Bull inside: 100 m² - Wuppertal: 95 m²
Bull outside: 1000 m² - Wuppertal: 700 m²
Breeding cows outside: 1000 m² per cow, so 3000 m² for Wuppertal (juveniles younger than 8 don't count) - Wuppertal 2225 m²
The numbers are just guidelines for the local veterinary inspection offices - some are strict and forced zoos to enlarge enclosures pretty quickly, other cities were more laid back and gave more time, but usually they are okay with the existing group if it's too small, but they don't allow new animals in this case. Thus it was a surprise that they could get Tooth in 2019. Without a bull they reach about what they need to have for three breeding cows.