Leonid Oleksandrovych Portenko (; 11 October 1896 – 26 May 1972) was a

Soviet The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...

ornithologist Ornithology, from Ancient Greek ὄρνις (''órnis''), meaning "bird", and -logy from λόγος (''lógos''), meaning "study", is a branch of zoology dedicated to the study of birds. Several aspects of ornithology differ from related discip ...

of Ukrainian origin who carried out extensive

zoogeographic Zoogeography is the branch of the science of biogeography that is concerned with geographic distribution (present and past) of animal species. As a multifaceted field of study, zoogeography incorporates methods of molecular biology, genetics, mor ...

studies on the birds of the northern and north-eastern

Palearctic realm The Palearctic or Palaearctic is a biogeographic realm of the Earth, the largest of eight. Confined almost entirely to the Eastern Hemisphere, it stretches across Europe and Asia, north of the foothills of the Himalayas, and North Africa. The ...

. He was born in

Smila Smila ( ) is a city located on Dnieper Upland near the Tyasmyn River, in Cherkasy Raion, Cherkasy Oblast of Ukraine. The Tiasmyn River, a tributary of the Dnieper River, flows through the city. In January 2022, the estimated population was 6 ...

, though most of his career was spent working in, and conducting expeditions from, the ornithological department of the Zoological Institute of the

Academy of Sciences of the Soviet Union The Academy of Sciences of the Soviet Union was the highest scientific institution of the Soviet Union from 1925 to 1991. It united the country's leading scientists and was subordinated directly to the Council of Ministers of the Soviet Union (un ...

Leningrad Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland ...

. His publications include: * 1939, 1941 – ''Fauna of the Anadyr area'' * 1954, 1960 – ''The birds of the USSR'' * 1972–1973 – ''The birds of the Chukchi Peninsula and Wrangel Island'' * 1973 – ''Fauna of birds of non-polar parts of the Northern Urals'' * 1975 – ''The birds of zonal steppes and deserts of Central Asia''

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Further reading