Actually, Bird's Tongue has two meanings. One aspect refers to the classification of shape, which includes fresh Tea leaves and finished tea.

The concept of Bird's Tongue in fresh tea leaves refers to the picking standard of one bud with two leaves, where the two leaves resemble a bird's beak and the bud in the middle looks like a small tongue.

The grades of fresh leaves are divided into several types: single bud tea is called Lotus Heart, one bud with one leaf is called Flag Spear, one bud with two leaves is called Bird's Tongue, and one bud with three or four leaves is called Eagle Claw.

In the context of finished tea, the concept of Bird's Tongue usually refers to dry tea that is flat and straight, shaped like a bird's tongue. It's important to note that the current standard for picking Bird's Tongue tea is typically single buds or one bud with one leaf, which differs from the concept of Bird's Tongue in fresh tea leaves.

For example, Chinese Black Tea is known as Black Tea in English because the dry tea of the black tea ancestor, Zheng Shan Xiao Zhong, is dark black in color. Foreign merchants named it based on the appearance of the dry tea rather than the color of the tea infusion.

Typical examples of Bird's Tongue teas include: Guizhou Bird's Tongue (Meitan Emerald Bud), Yibin Bird's Tongue from Sichuan, Jintan Bird's Tongue from Jiangsu, and Zhejiang Bird's Tongue. The other aspect is that Bird's Tongue refers to a tea plant variety and the tea made from its fresh leaves, such as Wuyi Bird's Tongue produced in Wuyi Mountain.