Lincoln Pierson Brower (September 10, 1931 – July 17, 2018) was an American entomologist and ecologist, known for his work on monarch butterflies, chemical ecology and conservation.

[4] In an oral history, he recalled being punished at school, being made to sit all day for skipping a class to go out and collect a species of moth; asked whether it was worth it, he stated "Absolutely".

[13] Unlike some popular sources, Brower did not suppose the monarch to be in danger of extinction, though he agreed that its migration across America was threatened.

In the 1980s, he assisted conservation groups in Mexico and the Mexican government to protect fir forests used by the species from logging.

[5] In the last decades of his life, he recorded the sharp decline in the monarch population of North America, down by some 80% in the 20 years to 2018, attributed to herbicides, logging, and weather events.