In 1980 he graduated from the bioclass of school No. 57 in Moscow and entered the biological faculty of Moscow State University. In 1985 he graduated from the Department of Vertebrate Zoology, Faculty of Biology and joined the Zoological Museum of Moscow State University (now Zoological Museum of Moscow University) as a guide. Since 1988 research scientist. 1989 to 1992 research scientist of the Soviet (Russian) -Vietnamese Research and Scientific-Technological Tropical Center. Since 1992 research scientist at the Zoological Museum, since 2001 Scientific Secretary of the Museum, since 2009 - Director of the Museum.
In 1999 he defended his thesis for the title of PhD of biological sciences, specializing in zoology, in 2008 defended his thesis for the title of doctor of biological sciences, specializing in zoology.
An ornithologist, a specialist in the fauna, ecology and functional morphology of forest birds of Vietnam, in the bird fauna of the center of the European part of Russia, since 1999 he has been heading the informal Program “Birds of Moscow and the Moscow Region”, which he created, uniting professional ornithologists and bird lovers.
Since 2010 he has been a member of the European Bird Census Council.
Author of 154 articles, author and editor of 22 books, member of 13 editorial boards of collections and current editions.
Membership in scientific and public organizations: Oriental Bird Club (since 1994), Aquatic Warbler Conservation Team (since founding in 1998), bureau of the European Bird Census Council (since 2010) and its Atlas Steering Committee (since 2011), Chairman of the Board of the Russian Society for the Conservation and Study of Birds. M.A. Menzbier (since 2009), First Vice President of the Menzbier Ornithological Society (since 2015).
Member of the Commission for the Red Data Book of the Ministry of Natural Resources of the Russian Federation (since 2014).
Member of the Supervisory Council of the Moscow Zoo (since 2014).
Membership in Academic Councils: Administrative Academic Council of the Faculty of Biology (since 2007), Dissertation Scientist Council of the Faculty of Biology of Moscow State University (since 2009), Museum Council of Moscow State University (since 2011), Scientific Council of the Darwin Museum (since 2011), Scientific Council of the Biological Museum named after K.A. Timiryazev (since 2012).