"Changing Shadows" by Herbert Sidney Palmer is a landscape painting that captures the vibrant colours and dynamic light of a pastoral scene. Palmer, active in the early to mid-20th century, was known for his Canadian landscapes that often featured rich, expressive brushwork and a strong sense of the changing seasons.

In this painting, the artist has depicted a lush countryside with trees in the full blaze of autumn colours. The trees are painted in warm hues of yellow, orange, and red, indicating the seasonal change. These bright colours stand out against the more subdued tones of the hills and the sky, suggesting the fleeting nature of autumn's palette.

The sky is a mix of blues, whites, and grays, indicating a cloudy day where the sun may be intermittently peeking through, casting changing shadows on the land below, hence the title. The cloud formations add depth to the sky and a sense of movement that contrasts with the stillness of the landscape.

Palmer's technique includes distinct, confident brush strokes that give texture to the foliage and the clouds. The composition has a balanced feel, with the eye being led from the foreground of vivid trees to the serene blue of the water in the mid-ground, and then to the rolling hills in the background.