On October 11, reporters learned from the Sichuan Academy of Forestry (referred to as the “Provincial Academy of Forestry”) that researchers recently discovered footage of a giant panda marking a tree with secretions while reviewing infrared camera data from the Longmenshan Forest Ecosystem National Observation and Research Station. This marks the first time the station has recorded such behavior from a giant panda.
In the video, a robust giant panda is seen repeatedly rubbing its rear against a tree trunk, a behavior that looks like it’s “scratching an itch.” In fact, this is the panda’s marking behavior. The footage was captured on June 8, 2024, near Swallow Rock in the Qingyi River observation area. Preliminary analysis indicates that the panda is a female in heat.

Why do giant pandas engage in marking behavior? According to researchers at the Provincial Academy of Forestry, the behavior serves two main purposes. First, it helps to mark territory. Adult pandas use secretions from their reproductive glands, which they rub on tree trunks or other objects, to define their territory. Second, during mating season, pandas intentionally leave secretions to attract mates, preparing for reproduction (How Do Giant Pandas Find Mates?).
The Longmenshan Forest Ecosystem National Observation and Research Station is located on the eastern edge of the Minshan area in the Giant Panda National Park. Since the park’s establishment, the station has been continuously monitoring the behavior of giant pandas and other associated species, collecting a wealth of photos and videos of rare wildlife. The first observation of giant panda marking behavior signals that the region’s ecological environment has improved, and the panda’s habitat is gradually expanding.