Category
page 119th-century Polish zoologists
Jan Sztolcman
Polish ornithologist (1854–1928)
Johann Dzierzon
pioneering apiarist (1811–1906)
Konstanty Jelski
Polish zoologist and ornithologist (1837-1896)
Feliks Paweł Jarocki
Polish entomologist (1790-1865)
Wojciech Jastrzębowski
Polish biologist (1799-1882)
Stanisław Konstanty Pietruski
Polish naturalist (1811-1874)
Ludwik Mlokosiewicz
Polish biologist (1831-1909)