Tadeusz Bolesław Vetulani (13 March 1897 – 24 February 1952) was a Polish agriculturalist and biologist, associate professor of Adam Mickiewicz University in animal husbandry.

[2]Zbigniew Jaworski of the Polish Academy of Sciences says that "based on his research and observations, he hypothesized that a forest variety of the tarpan (Equus cab.

had split off from the populations living in the steppes of Eastern Europe and had survived into the mid 18th century in the lands of Poland, Lithuania, and Prussia.

From 1931 to 1935 he worked as an associate professor and head of the Department of Animal Breeding at the Stefan Batory University in Vilnius.

[3] In February 1936, he founded a reserve and restoration scheme in Białowieża Forest involving the breeding of Polish koniks, putting his early hypothesis to practice.

[3] Vetulani rejected all proposals for collaboration with the Nazis and also refused to join the committee appointed to audit the Katyn graves, not wanting to serve the German propaganda.