Thomas Mayo Brewer

Thomas Mayo Brewer (November 21, 1814 – January 24, 1880) was an American naturalist.

Mayo is best known as the joint author, with Baird and Ridgway, of A History of North American Birds (3 volumes, 1874), which was the first attempt since John James Audubon's (thirty years prior) to complete the study of American ornithology.

Brewer was born in Boston. He graduated from Harvard College in 1835 and from Harvard Medical School three years later. He abandoned his career as a doctor after a few years to concentrate on writing and politics, later becoming editor of the Boston Atlas. He then joined the printing firm of Swan & Tileston, which became Brewer & Tileston when he became a partner in 1857.

Brewer spent his spare time contributing to a number of ornithological publications, including John James Audubon's Ornithological Biography. Brewer was a companion to Audubon, who gave Brewer's name to a duck, a blackbird and a rodent (Brewer's shrew mole) found on Martha's vineyard.

The Brewer family has been prominent in Massachusetts for 200 years, including James Brewer (1742–1806), an early American patriot leader and businessman, Gen. Wilmon Blackmar, a Civil War medal of honor winner, and Wilmon Brewer, a poet, biographer, and philanthropist.