Bianca Luiza Reinert (c. 1966 – 10 September 2018) was a Brazilian biologist and ornithologist.^[1][2] She was one of a group of ornithologists who discovered a previously undocumented species of swamp bird, Formicivora acutirostris. She also worked to create a nature reserve to preserve its habitat.^[3]

Reinert held a degree in Biological Sciences from the Pontifical Catholic University of Paraná, a master's degree in Forestry Sciences from the Federal University of Paraná, and a Ph.D. in Zoology from Rio de Janeiro State University.^[1]

Reinert was a researcher at the Natural History Museum in Curitiba.^[4] In 1995, she was working on the Parana coast with colleagues Dante Teixeira and Marcos Bonrnschien when they discovered an undocumented bird. On examination, the group decided it was a new genus as well as a new species: Stymphalornis acutirostris.^[5] The taboa swamp that the bird lived in was being encroached on by human activities, so in 2008 Reinert and others formed an organisation to create a nature reserve in nearby Guaratuba.^[1][6] In 2009, Reinert and four others purchased land in Guaratuba and had it designated as a Private Natural Heritage Reserve (Reserva Particular do Patrimônio Natural).^[7] In 2015, a species of toad found in Brazil, Melanophryniscus biancae, was named in her honor due to her conservation efforts.^[8]

Reinert collaborated with poet, Adélia Maria Woellner, and illustrator, Kitty Harvill to produce a picture book, A descoberta do Bicudinho-do-Brejo, which is about S. acutirostris and was released in July 2018.^[9] Reinert invited Woellner to work with her on the book in order to increase the public's knowledge of S. acutirostris.^[10]

• Conhecendo Aves Silvestres Brasileiras: Knowing Brazilian Birds (with Marcos R. Bornschein and Ricardo Belmonte-Lopes, 2004)^[11]

Reinert died after a battle with cancer and was buried in Curitiba.^[3] She was 52 years old.^[12]