Please cite this data as follows, and pay attention to the rights documented in the rights.txt:
Please respect the rights declared for each dataset in the download: 
GEO-Tag der Artenvielfalt: Birdrace-WeserEggeLäufer-Höxter doi:10.15468/sox39i
National Biodiversity Data Centre: Collated by the National Biodiversity Data Centre from different sources - Ireland's BioBlitz. Dataset/Occurrence. doi:10.15468/aiiz3z
UK National Biodiversity Network: Bristol Regional Environmental Records Centre - BRERC October 2009 doi:10.15468/vntgox
Museum für Naturkunde Berlin: Animal Sound Archive doi:10.15468/0bpalr
GEO-Tag der Artenvielfalt: Artenvielfalt der Nordsee - Helgoland doi:10.15468/omx28y
National Biodiversity Data Centre: Irish Wetland Birds Survey (I-WeBS) 1994-2001. doi:10.15468/yvlspf
Natural History Museum, University of Tartu: PlutoF platform observations doi:10.15156/bio/587440
Israel Nature & Parks Authority (Ed.) 1970 - (continuously updated): Vertebrate and vascular plant observations of the Israel Nature and Parks Authority. doi:10.15468/cmnjt1
naturgucker.de: naturgucker doi:10.15468/uc1apo
Devos K, T'Jollyn F, Brosens D, Desmet P (2012): Watervogels - Wintering waterbirds in Flanders, Belgium. v3.3. Research Institute for Nature and Forest (INBO). Dataset/Occurrence. http://doi.org/10.15468/lj0udq, http://doi.org/10.15468/lj0udq doi:10.15468/lj0udq
Taiwan Biodiversity Information Facility (TaiBIF): Bird Observation Data doi:10.15468/vz4efk
UK National Biodiversity Network: Staffordshire Ecological Record - SER Site-based Surveys doi:10.15468/h2yko0
Matley, JK et al. (2012): (Table 1) Density of seabirds (Fulmarus glacialis, Rissa tridactyla, Larus hyperboreus, Sterna paradisaea, and Stercorarius parasiticus) in Allen Bay 2010. doi:10.1594/PANGAEA.816018, In Supplement to: Matley, Jordan K; Fisk, Aaron T; Dick, Terry A (2012): Seabird predation on Arctic cod during summer in the Canadian Arctic. Marine Ecology Progress Series, 450, 219-228, doi:10.3354/meps09561 doi:10.1594/pangaea.816018
UK National Biodiversity Network: Yorkshire Naturalists' Union Marine and Coastal Section - Yorkshire Naturalists Union Marine and Coastal Section Records doi:10.15468/ajwexx
GEO-Tag der Artenvielfalt: BIRDRACE leucorhö statt logorrhö doi:10.15468/1nrp32
GBIF-Sweden: Lund Museum of Zoology (MZLU) doi:10.15468/mw39rb
National Biodiversity Data Centre: The Second Atlas of Breeding Birds in Britain and Ireland: 1988-1991 doi:10.15468/pkhsnb
POLLICHIA – Verein für Naturforschung und Landespflege e.V.: ArtenFinder doi:10.15468/jnnald
United States Geological Survey: USGS Patuxent Wildlife Research Center Seabirds Compendium doi:10.15468/w2vk7x
Finnish Museum of Natural History: Fieldjournal.org observation database doi:10.15468/zscvs5
UK National Biodiversity Network: National Trust - Wicken Fen nature reserve species data held by The National Trust doi:10.15468/iqeemg
GEO-Tag der Artenvielfalt: Birdrace_Gätkes_Schergen-Helgoland doi:10.15468/pkwfnx
***Not yet provided*** doi:10.15468/mmobpt
GEO-Tag der Artenvielfalt: BIRDRACE Punkbirder Helgoland doi:10.15468/exdwyg
Conservation of Arctic Flora and Fauna: Arctic Species Trend Index (ASTI) : Marine doi:10.15468/il2vr5
2014. EOD - eBird Observation Dataset. doi:10.15468/aomfnb
GEO-Tag der Artenvielfalt: BIRDRACE Nord-Seh-Team doi:10.15468/plszos
National Biodiversity Data Centre: Seabird 2000 doi:10.15468/gkx6zj
van der Jeugd H P (2015): Vogeltrekstation (NL) - Historical Data on Timing of Ringing of Nestling Birds. v1.1. Vogeltrekstation - Dutch Centre for Avian Migration and Demography. Dataset/Occurrence. http://ipt.nioo.knaw.nl/resource?r=vt-nioo-knaw-historic-ringdata&v=1.1 doi:10.15468/6l4ban
Conservation of Arctic Flora and Fauna: Circumpolar Seabird Monitoring Plan doi:10.15468/wwds1e
Korean Wild Bird Society: Birds - Wild Birds (KIDR-BI) doi:10.15468/iiz5lr
Museum of Biological Diversity, The Ohio State University: Borror Lab of Bioacoustics (BLB), Ohio State University doi:10.15468/wyz5x9
GEO-Tag der Artenvielfalt: Birdrace-Westfälische-Nachtigallen-Recklinghausen doi:10.15468/bfqg35
(see website) doi:10.15468/ee6ps6
Natural History Museum, University of Oslo: BioFokus doi:10.15468/jxbhqx
Atlantic Canada Conservation Data Centre (AC CDC) Data System. doi:10.15468/o2nplz
"Portal Ornitho.eus." Www.ornitho.eus. Aranzadi Zientzia Elkartea., http://doi.org/10.15470/jpxois doi:10.15470/jpxois
Iturribarria M (2015): Censo de aves acuáticas invernantes de la Comunidad Autónoma del País Vasco. v1.2. Basque Government. Dataset/Occurrence. http://doi.org/10.15470/05fo7k, http://doi.org/10.15470/05fo7k doi:10.15470/05fo7k
Wold, A et al. (2011): (Table 1) Biometrics of five seabird species from Kongsfjorden, Svalbard. doi:10.1594/PANGAEA.817999, In Supplement to: Wold, Anette; Jæger, Iris; Hop, Haakon; Gabrielsen, Geir W; Falk-Petersen, Stig (2011): Arctic seabird food chains explored by fatty acid composition and stable isotopes in Kongsfjorden, Svalbard. Polar Biology, 34(8), 1147-1155, doi:10.1007/s00300-011-0975-4 doi:10.1594/pangaea.817999
Centre d'estudis de la neu i de la muntanya d'Andorra (CENMA), Institut d'Estudis Andorrans: Vertebrats d'Andorra doi:10.15468/9czi29
UK National Biodiversity Network: Suffolk Biological Records Centre - Suffolk Biological Records Centre (SBRC) dataset doi:10.15468/ab4vwo
UK National Biodiversity Network: Staffordshire Ecological Record - SER Species-based Surveys doi:10.15468/q8qen3
National Biodiversity Data Centre: Collated by the National Biodiversity Data Centre from different sources - Local BioBlitz Challenge 2013. Dataset/Occurrence. doi:10.15468/gcyq62
National Biodiversity Data Centre: BirdWatch Ireland - An Atlas of Breeding Birds of the Burren and Aran Islands 1993 - 1996. Dataset/Occurrence. doi:10.15468/wu6pzf
National Biodiversity Data Centre: European Seabirds at Sea (ESAS) bird sightings from 1980 to 2003. doi:10.15468/pwoepc
Copenhagen Bird Ringing Centre (Year). doi:10.15468/41sdls
The Norwegian Biodiversity Information Centre (NBIC): Norwegian Species Observation Service doi:10.15468/zjbzel
Bird Studies Canada. 2004. BC Coastal Waterbird Survey Database. Port Rowan, Ontario: Bird Studies Canada doi:10.15468/gmkmz9
ArtDatabanken: Artdata doi:10.15468/kllkyl
National Biodiversity Data Centre: Clare Biological Records Centre dataset doi:10.15468/fbb6kb
Cite the source of recordings as Macaulay Library (ML).<br><br>

When possible, include the following data in your citation:<br><br>

ML Media-collection Catalog-number<br>
Common Name - Scientific name<br>
Recordist<br>
Location<br>
Date<br>
Macaulay Library/Cornell<br><br>

For example:<br><br>

ML Audio 2081<br>
Green Heron - Butorides virescens<br>
Sutherland, Charles A<br>
United States, New York, Tompkins, 3 km NE of Ithaca, Sapsucker Woods Pond<br>
29 July 1962<br>
Macaulay Library, www.macaulaylibrary.org<br>
Cornell Lab of Ornithology<br><br>

To cite an online recording, use the URL from the specimen record page. This URL is a stable globally unique identifier, or GUID, and also approximates the format for a life science identifier(LSID): <br><br>

institution_collection_catalog# <br>
(e.g. macaulaylibrary.org/video/12345).<br><br>

The long url form should not be used. <br>
(e.g. macaulaylibrary.org/video/12345/cardinal-new-york-2011).<br><br>

For more information: http://macaulaylibrary.org/cite-recordings doi:10.15468/ckcdpy
Martí, R. y Del Moral, J. C. (eds). 2003. Atlas de las Aves Reproductoras de España. Dirección General de Conservación de la Naturaleza-Sociedad española de Ornitología. Madrid, 733 pp. doi:10.15468/ytmnyf
SPN - Service du Patrimoine naturel, Muséum national d'Histoire naturelle, Paris: Inventaire National du Patrimoine Naturel : Données des campagnes de Suivi Aérien de la Mégafaune Marine (SAMM) de France métropolitaine doi:10.15468/dylxhs
FERRER, XAVIER (fechade consulta). Mòdul Vertebrats. Banc de Dades de Biodiversitat de Catalunya. Generalitat de Catalunya i Universitat de Barcelona. http://biodiver.bio.ub.es/biocat/homepage.html doi:10.15468/k7okvx
Folklore and Natural History Museum: Birds (JNHM-BI) doi:10.15468/tuappb
Korea Institut