It seems to be common knowledge that birds perch on trees. But there is a bird called the wallcreeper, which likes to "challenge the limits", either perching on high mountain cliffs and steep slopes, or on the walls of tall buildings. They are also found in some of the deepest ravines and valleys.

The wallcreeper has many nicknames, but the most beautiful one is the "butterfly bird on the cliff". It has a small body and red patterns and white spots on its wings, with a noble black base, looking like a swaying and graceful butterfly from afar.

Such a beautiful appearance is naturally loved by photographers. However, the wallcreeper mostly liveson the cliff and often jumps around, so it is a great test of photography skills to capture it well. In Sichuan, some places such as Leshan and Ya'an are good locations to capture their beautiful images.