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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Zoology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Zoology</journal-title><trans-title-group xml:lang="ru"><trans-title>Зоологический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0044-5134</issn><issn publication-format="electronic">3034-5456</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">700436</article-id><article-id pub-id-type="doi">10.7868/S3034543X25110058</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">POLYMELIA IN A COMMON TEAL (<italic>ANAS CRECCA</italic>) IN KAMCHATKA</article-title><trans-title-group xml:lang="ru"><trans-title>РЕГИСТРАЦИЯ ПОЛИМЕЛИИ У ЧИРКА-СВИСТУНКА (<italic>ANAS CRECCA</italic>) НА КАМЧАТКЕ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gerasimov</surname><given-names>N. N</given-names></name><name xml:lang="ru"><surname>Герасимов</surname><given-names>Н. Н</given-names></name></name-alternatives><email>nikolay.gerasimov-36@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Artukhin</surname><given-names>Yu. B</given-names></name><name xml:lang="ru"><surname>Артюхин</surname><given-names>Ю. Б</given-names></name></name-alternatives><email>artukhin61@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kamchatka Branch, Pacific Geographical Institute, Far Eastern Department, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Камчатский филиал, Тихоокеанский институт географии ДВО РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-11-15" publication-format="electronic"><day>15</day><month>11</month><year>2025</year></pub-date><volume>104</volume><issue>11</issue><issue-title xml:lang="en">VOL 104, NO11 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 104, №11 (2025)</issue-title><fpage>51</fpage><lpage>57</lpage><history><date date-type="received" iso-8601-date="2026-01-08"><day>08</day><month>01</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://rjsvd.com/0044-5134/article/view/700436">https://rjsvd.com/0044-5134/article/view/700436</self-uri><abstract xml:lang="en"><p>This paper reports the first documented case of polymelia in a wild bird belonging to the order Anseriformes. A young male common teal (<italic>Anas crecca</italic>) was obtained in the autumn of 2012 near the settlement of Klyuchi (56.3° N, 160.8° E) in central Kamchatka. The bird possessed a supernumerary hind limb attached to the caudal part of the pelvis, and the foot contained five toes.</p></abstract><trans-abstract xml:lang="ru"><p>Представлена информация о первом наблюдении полимелии у диких птиц из отряда гусеобразных (Anseriformes). Молодого самца чирка-свистунка (<italic>Anas crecca</italic>) добыли осенью 2012 г. близ пос. Ключи (56.3° с.ш., 160.8° в.д.) в северной части Центральнокамчатской низменности. Птица имела дополнительную заднюю конечность, прикрепленную к каудальной части таза, в ее стопе было пять пальцев.</p></trans-abstract><kwd-group xml:lang="en"><kwd>bird</kwd><kwd>polymelia</kwd><kwd>pathology</kwd><kwd>supernumerary limb</kwd><kwd>common teal</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>полимелия</kwd><kwd>патология</kwd><kwd>дополнительная конечность</kwd><kwd>чирок-свистунок</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания КФ ТИГ ДВО РАН по теме “Структурно-функциональная организация, динамика и продуктивность наземных и прибрежных экосистем на Дальнем Востоке РФ. Разработка научных основ и экономических инструментов устойчивого природопользования” (№ гос. регистрации 124012700496-4).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Герасимов Н.Н., 2004. 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