Among Taiwan's endemic bird species, the "Firecrest" is the smallest, with a length of only 9 cm. Due to its high-latitude physique, it prefers elevations of 2000 to 3700 meters in Taiwan, especially fond of perching and foraging in two-leaf pines, hemlocks, and fir forests, giving it another nickname, the "little fir bird." The Firecrest is petite and agile in flight and hopping, lively and active. It often jumps in the lower layers of coniferous tree crowns, pecking at insects or feeding upside down on pine cones.