Data Analysis with Open Source Tools

Colophon

The animal on the cover of Data Analysis with Open Source Tools is a common kite, most likely a member of the genus Milvus. Kites are medium-size raptors with long wings and forked tails. They are noted for their elegant, soaring flight. They are also called “gledes” (for their gliding motion) and, like the flying toys, they appear to ride effortlessly on air currents.

The genus Milvus is a group of Old World kites, including three or four species and numerous subspecies. These kites are opportunistic feeders that hunt small animals, such as birds, fish, rodents, and earthworms, and also eat carrion, including sheep and cow carcasses. They have been observed to steal prey from other birds. They may live 25 to 30 years in the wild.

The genus dates to prehistoric times; an Israeli Milvus pygmaeus specimen is thought to be between 1.8 million and 780,000 years old. Biblical references to kites probably refer to birds of this genus. In Coriolanus, Shakespeare calls Rome “the city of kites and crows,” commenting on the birds’ prevalence in urban areas.

The most widespread member of the genus is the black kite (Milvus migrans), found in Europe, Asia, Africa, and Australia. These kites are very common in many parts of their habitat and are well adapted to city life. Attracted by smoke, they sometimes hunt by capturing small animals fleeing from fires.

The other notable member of Milvus is the red kite (Milvus milvus), which is slightly larger than the black kite and is distinguished ...