 Some crustous fibrillous fungus on a birch tree in Sosnovka Park. Saint Petersburg, Russia, September 13, 2017
 Chaga mushroom (Inonotus obliquus) on a birch tree in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, March 2, 2017
 Fungus (mushrooms) Phellinus laevigatus on a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
 Birch trees and logs in Sosnovka Park. Saint Petersburg, Russia, May 30, 2009
 Birch trees in Sosnovka Park. Saint Petersburg, Russia, April 22, 2017
 Birch trees in Sosnovka Park. Saint Petersburg, Russia, September 3, 2018
 Group of birch trees on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
 Birch trees of Karasiovoe Lake in northern area of Sosnovka Park. Saint Petersburg, Russia, September 24, 2015
 Birch trees on a meadow near Kanneliarvi, 40 miles north-west from Saint Petersburg, Russia, July 29, 2005
 Birch trees on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
 Birch trees in eastern part of Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
 Birch trees from Listvennaya Alley in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
 Birch trees along Krasnogo Bugra Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
 Cluster of elm oyster mushrooms (Hypsizygus ulmarius, Lyophyllum ulmarium) on a birch tree between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, September 28, 2016
 Birch trees in Sosnovka Park. Saint Petersburg, Russia, October 20, 2016
 Birch trees in Sosnovka Park. Saint Petersburg, Russia, December 1, 2016
 Jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Birch trees on Krasnogo Bugra Alley in Pavlovsk, suburb of Saint Petersburg. Russia, April 6, 2017
 Crust tinder fungus Phellinus(?) on a birch tree in area of Dibuny - Pesochny, near Saint Petersburg. Russia, June 3, 2017
 Birch trees in eastern part of Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
 Birch and mountain ash trees in Sosnovka Park. Saint Petersburg, Russia, May 31, 2009
 Birch trees in Sosnovka Park in Saint Petersburg, Russia, June 22, 2010
 Birch tree on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
 Birch trees near Lamsky Pavilion in Aleksandrovsky (Alexander) Park. Pushkin (former Tsarskoe Selo) near Saint Petersburg, Russia, September 19, 2013
 Birch tree stand on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
 Birch trees in Sosnovka Park. Saint Petersburg, Russia, September 28, 2015
 Malformed trunk of a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
 Spreading fungus (mushrooms) Phellinus laevigatus on a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
 Birch trees in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, June 14, 2011
 Birch trees in eastern part of Sosnovka Park at morning. Saint Petersburg. Russia, September 9, 2007
 Several birch trees on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
 Birch trees on Laskovy Beach of Gulf of Finland in Solnechoe, suburb of Saint Petersburg. Russia, February 15, 2017
 Birch trees on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, March 24, 2017
 Birch trees in Sosnovka Park. Saint Petersburg, Russia, June 11, 2009
 Birch trees from Listvennaya Alley in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
 Birch trees near Red Bugor Alley and Tyarlevskaya Cutting in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 Birch trees in fog near northern end of Beloe Lake in Gatchina, a suburb of Saint Petersburg. Russia, September 27, 2015
 Birch trees of Krasnogo Bugra Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
 Golden scalycap mushrooms (Pholiota aurivella) on a birch tree near Kavgolovskoe Lake south from Oselki, 8 miles north from Saint Petersburg. Russia, September 23, 2015
 Birch trees of Krasnodolinnaya Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 Snowy birch trees in Sosnovka Park. Saint Petersburg, Russia, November 25, 2016
 Iron wire grown inside a birch tree west from Dibuny - Pesochny area near Saint Petersburg. Russia, February 4, 2017
 Green alga Trentepohlia umbrina with orange carotenoid pigments and moss on a birch tree west from Dibuny - Pesochny area near Saint Petersburg. Russia, February 4, 2017
 Thin crust of fungus (mushrooms) Phellinus laevigatus on a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
 Birch trees in Sosnovka Park at morning. Saint Petersburg, Russia, November 6, 2016
 Fall colors of birch trees near Staroshaleynaya Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
 Birch trees of Krasnodolinnaya Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 18, 2015
 Road with birch trees in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
 Birch trees on Krasnodolinnaya Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
 Fall foliage of birch trees on Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2013
 Birch tree log damaged by insect larvae in Sosnovka Park. Saint Petersburg, Russia, September 15, 2013
 Catkins on a birch like tree in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 14, 2011
 Stones and birch trees in Urochishche Teterevskoe place near Lembolovo, 45 miles north from Saint Petersburg. Russia, August 27, 2013
 View of a birch tree in valley of Slavianka River from Eleninskaya Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
 Road and birch trees east from Leypyasuo. North from Saint Petersburg, Russia, June 7, 2014
 Birch trees from Staroshaleynaya Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, July 19, 2015
 Birch trees of Red Bugor Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 Birch trees near Tyarlevskaya Cutting in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 Birch trees near Red Bugor Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 Birch trees in a forest west from railroad in Otdelny Park in Pushkin (former Tsarskoe Selo), a suburb of Saint Petersburg. Russia, September 26, 2015
 Birch trees in Sylvia area in Gatchina, a suburb of Saint Petersburg. Russia, September 27, 2015
 Birch trees near Nesterova Street in Gatchina, a suburb of Saint Petersburg. Russia, September 27, 2015
 Fall colors of birch trees behind the war monument in Sosnovka Park. Saint Petersburg, Russia, September 29, 2015
 Birch trees on Mariyinskaya Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
 Birch trees of Mariyinskaya Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 6, 2016
 Pear-shaped puffball mushrooms (Lycoperdon pyriforme) shaped like pointed eggs on a birch tree near Lisiy Nos, west from Saint Petersburg, Russia, August 23, 2016
 Elm oyster mushrooms (Hypsizygus ulmarius, Lyophyllum ulmarium) on a birch tree between Orekhovo and Lembolovo, north from Saint Petersburg. Russia, September 28, 2016
 Birch trees in Sosnovka Park. Saint Petersburg, Russia, September 29, 2016
 A tree cut by beavers in Birch Island in Gatchina Park. Gatchina, a suburb of Saint Petersburg, Russia, October 12, 2016
 Birch trees near Lower Rozovopavilionny Pond in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, October 14, 2016
 Birch trees of Krasnodolinnaya Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, October 14, 2016
 Birch trees in Sosnovka Park. Saint Petersburg, Russia, October 25, 2016
 Birch trees in Sosnovka Park. Saint Petersburg, Russia, November 23, 2016
 Birch trees in fresh snow in Sosnovka Park. Saint Petersburg, Russia, November 25, 2016
 Rotten polypore mushroom on a birch tree west from Dibuny - Pesochny area near Saint Petersburg. Russia, February 4, 2017
 Rotten trunk of a birch tree filled by roots near Lisiy Nos, west from Saint Petersburg. Russia, February 18, 2017
 Crust of fungus (mushrooms) Phellinus laevigatus on a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
 Texture of crust of fungus (mushrooms) Phellinus laevigatus on a birch tree near Lisiy Nos, south from Saint Petersburg. Russia, February 18, 2017
 Willow bracket fungus (Phellinus igniarius mushrooms) on a birch tree in Yuntolovsky Park. Saint Petersburg, Russia, February 23, 2017
 Cinnamon texture of Chaga mushroom (Inonotus obliquus) taken from a birch tree in Yuntolovsky Park. Saint Petersburg, Russia, February 23, 2017
 Spruce and birch trees in snow west from Kavgolovo Lake near Toksovo, north from Saint Petersburg. Russia, February 24, 2017
 Moss on a birch tree in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, March 2, 2017
 Black tissue of Chaga mushroom (Inonotus obliquus) on a birch tree in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, March 2, 2017
 Old jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Big jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) with snow on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Decaying basidiome of jelly rot (Phlebia tremellosa, Merulius tremellosus) with a saprobic fungus Botryobasidium subcoronatum on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Caps of jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Corticioid fungus on birch tree in Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
 Birch trees with snow in Sosnovka Park. Saint Petersburg, Russia, April 22, 2017
 Birch trees at snowfall in Sosnovka Park. Saint Petersburg, Russia, April 22, 2017
 Birch trees in Sosnovka Park. Saint Petersburg, Russia, April 22, 2017
 Birch mazegill mushroom (Lenzites betulina) from a burned conifer tree near Orekhovo, 40 miles north from Saint Petersburg. Russia, April 27, 2017
 Crust poroid fungus Phellinus(?) on a birch tree in area of Dibuny - Pesochny, near Saint Petersburg. Russia, June 3, 2017
 Some crustous fungus at the base of a birch tree in Sosnovka Park. Saint Petersburg, Russia, September 13, 2017
 Brittlestem mushrooms Psathyrella cernua (Homophron cernuum)(?) near a birch tree on the central alley in Park of Polytechnic Institute. Saint Petersburg, Russia, September 19, 2017
 Birch trees of Botanicheskaya Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 27, 2017
 Birch and maple trees in Sosnovka Park. Saint Petersburg, Russia, October 3, 2017
 Birch trees in northern part of Sosnovka Park. Saint Petersburg, Russia, October 3, 2017
 Birch trees in northern part of Sosnovka Park. Saint Petersburg, Russia, October 8, 2017
 Snow and bent birch trees in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
 Birch trees near Razliv Lake near Lenin Trail in area of Razliv, north-west from Saint Petersburg, Russia, May 21, 2019
 Birch trees of Krasnogo Bugra Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 26, 2016
 Krasnogo Bugra Alley with birch trees in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 26, 2016
 Cinnabar bracket (Pycnoporus cinnabarinus) mushrooms on a birch tree in Kuzmolovo north from Saint Petersburg. Russia, May 8, 2017
 Birch trees in Urochishche Hianikiayze area near Kuzmolovo, north from Saint Petersburg. Russia, September 24, 2017
 Birch tree trunk filled with roots in Blizhnie Dubki area near Lisiy Nos, west from Saint Petersburg. Russia, September 26, 2017
 Birch and spruce trees in a forest along the gulf in area of Lisiy Nos - Morskaya, west from Saint Petersburg. Russia, September 26, 2017
 Birch trees on Krasnogo Bugra Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 27, 2017
 Birch trees near Zelionoy Zhenshchiny Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 27, 2017
 Birch trees in Sergievka Park. Old Peterhof, west from Saint Petersburg, Russia, October 5, 2017
 Birch woodwart (Jackrogersella multiformis) on a fallen tree near Lisiy Nos, south from Saint Petersburg. Russia, August 17, 2018
|