With her subject matter and brushwork both influenced by the French landscape painters of the 19th century, Bannon gravitates to those gently mundane setting in which nature can be seen embracing the human community. This can often be seen in her work where a solitary figure is involved with nature.
Her impressionistic oil paintings show an emphasis on light, loose brushwork. As a naturalist, themes include gardens, vacation retreats, historical homes, wetlands and wildlife as well as macroscopic views of the land. Like impressionists, she renders the quiet scenes with a palette of intense greens and blues that are anything but quiet. Many scenes are reminders of how man and nature come together.