Taking into account the information I took from Brazilian newspapers:
- May 1972: in a shipment of thirty-five animals, the first confirmed tree-kangaroo in Brazil arrived at the São Paulo zoo. Its species was not stated, but I believe it was
Dendrolagus ursinus.
Jornal do Brasil (RJ) - 1970 a 1979 - DocReader Web
- Between May 1972 and October 1975: another specimen of tree-kangaroo arrived in the country, also sent to São Paulo.
- October 6, 1975: both animals are sent to RioZoo.
- August 1, 1977: for the first time, the couple's first joey, a female, put her paws out of her mom's pouch.
- July 6, 1978: it was announced RioZoo's female had another joey. The new baby was expected to completely leave the marsupium in August.
O Fluminense (RJ) - 1970 a 1979 - DocReader Web
Picture by Jorge Peter, taken in 1978 at RioZoo.
*I'm not really sure of which species the animals on the picture are, but the mother looks like a grizzled tree-kangaroo, which means the joey could be a hybrid between
Dendrolagus inustus and
Dendrolagus ursinus.*
Fotos resgatam alegria do público no Jardim Zoológico do Rio, apesar de histórico de problemas | Blog do Acervo - O Globo
- June 1980: another tree-kangaroo was born in Rio, this time a female.
A Luta Democratica : Um jornal de luta feito por homens que lutam pelos que não podem lutar (RJ) - 1954 a 1987 - DocReader Web
- July 1981: a tree-kangaroo from RioZoo was sent to the Glória marina to be part of Riotur advertising.
Jornal do Brasil (RJ) - 1980 a 1989 - DocReader Web
*If you take a closer look at the picture shown on the newspaper, you will realize the animal does look a lot like a black tree-kangaroo.*
- Unknown date, 1981: according to the CITES Trade Database, an ursine tree-kangaroo was shipped from Brazil to Italy.
CITES Trade Database
- February 1982: another baby kangaroo, a female, saw the world for the first time. The sire, as the report below says, was relocated back to São Paulo.
Jornal da Orla (SP) - 1973 a 2015 - DocReader Web
Jornal da Orla (SP) - 1973 a 2015 - DocReader Web
- 1991: from an announcement made by Jornal do Brasil, it is guaranteed that, until at least the 1990s, tree-kangaroos were held by RioZoo
Tribuna da Imprensa (RJ) - 1980 a 1989 - DocReader Web
Jornal do Brasil (RJ) - 1990 a 1999 - DocReader Web