Cinnamomum cassia United Kingdom, and India is Chinese cinnamon. "Indonesian cinnamon" ("C. burmannii") is sold in much smaller amounts. Chinese cassia is produced in both China and Vietnam. Until the 1960s, Vietnam was the world's most important producer of Saigon cinnamon, which has a higher oil content , and consequently has a stronger flavor. Because of the disruption caused by the Vietnam War, however, production of Indonesian cassia in the highlands of the Indonesia island of Sumatra was increased to meet demand. Indonesian cassia has the lowest oil content of the three types of cassia, so commands the lowest price. Chinese cassia
Cassia crossbill Red Squirrels as their beak is adapted for a specific type of pine cone. This has led to a coevolutionary arms race with the lodgepole pine, which explains why they are confined in such a small area. Other Red Crossbill call types, typically call type 2 & 5, are also found in these areas, but seldomly breed here due to being poorly adapted to the pine cone structure. Due to their restricted range and habitat, there is a cause for concern for this species survival. The Cassia crossbill ("Loxia sinesciuris") was first described in 2009 as the South Hills crossbill,