Jack M. Ducker

[4] Although most of the artist's documented works are undated they are thought to have been created from about 1910 through 1930,[5] with at least one oil on canvas attributed to the late 19th century by Christie's auction house.

[11] Rocky mountains are often a focal point, with additional emphasis on other natural objects such as gnarled leafy trees, short shrubs, tall green grasses, and placid lakes and ponds.

[11] On occasion Ducker includes wildfowl and grazing animals, such as sheep, and the farmers who tend them.

Much of Ducker's documented brushwork is moderately tight with carefully controlled minute details applied with a fine brush or like instrument.

Within the documented paintings, Ducker tends to sign in the lower left or right corners of the canvas with the signature "JMDucker" or "JDucker" – occasionally underlining the surname.