The image displays a detailed, close-up view of tree bark in Masaiti, Zambia

The image displays a detailed, close-up view of tree bark in Masaiti, Zambia. The bark is characterized by a rough, deeply fissured texture, presenting shades of dark brown, grey, and patches of olive-green lichen. Centrally, a pronounced, irregular concavity is visible, approximately 12 cm in diameter. Within this depression, a significant quantity of a viscous, dark reddish-brown, glossy substance is present, adhering to the internal surfaces of the cavity and slightly staining the surrounding bark. No animate subjects or man-made objects are depicted.