At one time, Petaluma was known as the "Egg Capital of the World," sparking such nicknames as "Chickaluma". Petaluma hosted the only known Poultry drugstore and is the place where the egg incubator was invented by Lyman Byce in 1879. The Sonoma County Poultry Collection documents this history through images, newspaper clippings and more. The collection is part of the Sonoma County Local History & Culture.