Hector Giacomelli (April 1, 1822 in Paris – December 1, 1904 in Menton), was a French watercolorist, engraver and illustrator, best known for his paintings of birds.

His 24 finches perched in a row by the French artist referred to by the publisher Henri Beraldi as "the Van Huysum of tiny birds ... A respectable bird must be a Giacomelli bird; A non-Giacomelli bird is a false bird".