C. L. Gloger

Constantin Wilhelm Lambert Gloger
Born	17 September 1803 Grottkau, Silesia
Died	30 December 1863 (aged 60)
Citizenship	Kingdom of Prussia
Fields	Zoology, ornithology
Known for	Gloger's rule

Constantin Wilhelm Lambert Gloger (17 September 1803 near Grottkau, Silesia, Kingdom of Prussia – 30 December 1863 in Berlin) was a German zoologist and ornithologist.

Gloger was the first person to recognise the structural differences between swallows and swifts, and also the first to put up artificial bat boxes.

He was the originator of Gloger's rule, which states that dark pigments increase in races of animals living in warm and humid habitats. He put forward this theory in his Das Abändern der Vögel durch Einfluss des Klimas (1833). His other works include Gemeinnütziges Hand-und Hilfsbuch der Naturgeschichte (1841).

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