Best Bion

Zabiyaka was a Soviet rhesus macaque that flew with Zhakonya on Bion 9 in 1989, sharing the monkey endurance record of 13 days 17 hours.

Krosh was a Russian rhesus macaque that flew on Bion 10 in 1992 and 1993; after rehabilitation on Earth, he later produced offspring.

Abrek was a Soviet rhesus macaque that flew on Bion 6, or Kosmos 1514, in 1983, the Soviet Union's first orbital primate mission.

Bion was a Soviet rhesus macaque that flew with Abrek on Bion 6 in 1983, helping begin the USSR's Bion satellite primate program.

Dryoma was a Soviet rhesus macaque that flew on Bion 8 in 1987; after recovery, he was reportedly presented to Cuban leader Fidel Castro.

Lapik was a Russian rhesus macaque that flew on Bion 11 from December 24, 1996, to January 7, 1997, the last Bion monkey mission.

Yerosha was a Soviet rhesus macaque that flew with Dryoma on Bion 8 from September 29 to October 12, 1987, for orbital life-science studies.

Verny was a Soviet rhesus macaque that flew on Bion 7, or Kosmos 1667, from July 10 to July 17, 1985, in orbital biomedical research.

Ivasha was a Russian rhesus macaque that flew on Bion 10 from December 29, 1992, to January 7, 1993, in post-Soviet orbital research.

Multik was a Russian rhesus macaque that flew on Bion 11 in 1996 and 1997; he died under anesthesia during post-flight biopsy sampling.