original description(of)Gunnerus, J.E. (1767). Beskrifning på trenne Norrska Sjö-Kråk, Sjö-Pungar kallade. <em>Kungl. Svenska Vetenskapsakademiens Handlingar.</em> 28: 114-124. (look up in IMIS) page(s): 251 [details]
context source (HKRMS)HKBWS. (2013). Hong Kong Bird Report 2011. <em>The Hong Kong Bird Watching Society.</em> [details]
context source (Schelde)Maris, T.; Beauchard, O.; Van Damme, S.; Van den Bergh, E.; Wijnhoven, S.; Meire, P. (2013). Referentiematrices en Ecotoopoppervlaktes Annex bij de Evaluatiemethodiek Schelde-estuarium Studie naar “Ecotoopoppervlaktes en intactness index”. <em>Monitor Taskforce Publication Series, 2013-01. NIOZ: Yerseke.</em> 35 pp. (look up in IMIS) [details]
context source (BeRMS 2020)Research Institute for Nature and Forest (INBO). European Seabirds at Sea - data collected by the Research Institute for Nature and Forest (INBO). INBO Seabird distribution data (all trips).[details]
basis of recordPeterson, R.T.; Peterson, V.M. (2002). A field guide to the birds of eastern and central North America. <em>Fifth Edition.</em> Peterson Field Guide Series. Houghton Mifflin Company. New York. 427 p.[details]
additional sourceUrban, E. K.; Fry, C. H.; Keith, S. (1986). The Birds of Africa, Volume II. <em>Academic Press, London.</em> [details]
additional sourceLiu, J.Y. [Ruiyu] (ed.). (2008). Checklist of marine biota of China seas. <em>China Science Press.</em> 1267 pp. (look up in IMIS) [details] Available for editors
additional sourceDyntaxa. (2013). Swedish Taxonomic Database. Accessed at www.dyntaxa.se [15-01-2013]., available online athttp://www.dyntaxa.se[details]
additional sourceIntegrated Taxonomic Information System (ITIS). , available online athttp://www.itis.gov[details]
Present Inaccurate Introduced: alien Containing type locality