Harald von Loudon

Baron Harald Georg Gideon Freiherr von Loudon (30 April 1876–1 January 1959) was a Baltic German ornithologist.

[2] He began his ornithological research in the 1890s, making observations near his home in the vicinity of Valmiera and Cēsis in present-day Latvia.

In the spring of 1896, he went on a scientific journey to the southern part of the Russian Empire, during which he made the acquaintance of Gustav Radde and Nikolai Zarudny.

von Loudon came to make an additional five such ornithological expeditions, to the Caucasus, the Caspian Sea, Crimea and Central Asia.

In 1922 his property including manor with lands (513 hectares) was confiscated by Latvian state for his help to the German troops during the war.