Diet Overlap

Tadorna tadorna (Common Shelduck)
Chroicocephalus ridibundus (Common Black-headed Gull)

Common Diet

Abra marshalli (Baltic macoma)
Cerastoderma edule (Common cockle)
Corophium volutator (mud shrimp)
Hediste diversicolor (veelkleurige zeeduizendpoot)

Common Habitat

Ackerhügelland westlich Erfurt mit Fahnerscher Höhe
Adata-Tundzha
Aegean and Western Turkey sclerophyllous and mixed forests
Akeragh, Banna and Barrow Harbour SPA
Akionlahti
Al Wathba Wetland Reserve
Alai-Western Tian Shan steppe
ALBUFERA DE ADRA
Alfsee
Alps conifer and mixed forests
Altai steppe and semi-desert
Altmühltal mit Brunst-Schwaigau und Altmühlsee
ALYKI KITROUS - EVRYTERI PERIOCHI
Amur meadow steppe
AMVRAKIKOS KOLPOS, DELTA LOUROU KAI ARACHTHOU (PETRA, MYTIKAS, EVRYTERI PERIOCHI)
AMVRAKIKOS KOLPOS, LIMNOTHALASSA KATAFOURKO KAI KORAKONISIA
Anatolian conifer and deciduous mixed forests
Andakill Protected Habitat Area
ANSE DU FIER D'ARS EN RE
Arabian Desert and East Sahero-Arabian xeric shrublands
Arabian Peninsula coastal fog desert
Aree delle risorgive di Viarolo, Bacini di Torrile, Fascia golenale del Po
Atanasovsko ezero
Atlantic mixed forests
Azerbaijan shrub desert and steppe
Bacini ex-zuccherificio di Argelato e Golena del Fiume Reno
BAHIA DE CADIZ
Baie de Morlaix
Baie de Saint-Brieuc - Est
Baie de Vilaine
Baie du Mont Saint Michel
Bakarlaka
Balkan mixed forests
Ballycotton Bay SPA
Ballymacoda Bay SPA
Baltic mixed forests
Basses Vallées du Cotentin et Baie des Veys
Biotopi e Ripristini ambientali di Bentivoglio, S. Pietro in Casale, Malalbergo e Baricella
Biotopi e Ripristini ambientali di Crevalcore
Biotopi e Ripristini ambientali di Medicina e Molinella
Blacksod Bay/Broadhaven SPA
Bohai Sea saline meadow
Bosco della Mesola, Bosco Panfilia, Bosco di Santa Giustina, Valle Falce, La Goara
Boyne Estuary SPA
Broadmeadow/Swords Estuary SPA
Burgasko ezero
CABO DE GATA-NIJAR
Caledon conifer forests
Camargue
Canneti del Lago Maggiore
Cantabrian mixed forests
Caspian Hyrcanian mixed forests
Caspian lowland desert
Castlemaine Harbour SPA
Caucasus
Caucasus mixed forests
Central Anatolian deciduous forests
Central Anatolian steppe
Central Asian northern desert
Central Asian riparian woodlands
Central China loess plateau mixed forests
Central European mixed forests
Changbai Mountains mixed forests
Changjiang Plain evergreen forests
Chausey
Chelopechene Fish-ponds
Clot de Galvany
COMPLEJO ENDORREICO DE UTRERA
Confluence des vallées de la Meuse et de la Chiers
Cork Harbour SPA
CUENCA DE GALLOCANTA
Cummeen Strand SPA
Da Hinggan-Dzhagdy Mountains conifer forests
Daurian forest steppe
Deccan thorn scrub forests
DELTA ACHELOOU, LIMNOTHALASSA MESOLONGIOU - AITOLIKOU KAI EKVOLES EVINOU, NISOI ECHINADES, NISOS PET
DELTA ACHELOOU, LIMNOTHALASSA MESOLONGIOU - AITOLIKOU, EKVOLES EVINOU, NISOI ECHINADES, NISOS PETALA
DELTA AXIOU - LOUDIA - ALIAKMONA - ALYKI KITROUS
DELTA AXIOU - LOUDIA - ALIAKMONA - EVRYTERI PERIOCHI - AXIOUPOLI
Delta del Po
DELTA EVROU
DELTA EVROU KAI DYTIKOS VRACHIONAS
DELTA NESTOU KAI LIMNOTHALASSES KERAMOTIS - EVRYTERI PERIOCHI KAI PARAKTIA ZONI
DELTA NESTOU KAI LIMNOTHALASSES KERAMOTIS KAI NISOS THASOPOULA
Dinaric Mountains mixed forests
DOÑANA
Donegal Bay SPA
Dümmer
Dundalk Bay SPA
Durankulak Lake
Eastern Anatolian montane steppe
Eastern Gobi desert steppe
Eastern Mediterranean conifer-sclerophyllous-broadleaf forests
EKVOLES POTAMOU STRYMONA
El Fondo d'Elx-Crevillent
Emin Valley steppe
Emine
Emsmarsch von Leer bis Emden
Emstal von Lathen bis Papenburg
English Lowlands beech forests
Engures ezers
Es Trenc-Salobrar de Campos
Esterweger Dose
Estuaire de la Gironde : Marais du Blayais
Etang de la Horre
Etangs entre Istres et Fos
Etangs palavasiens et étang de l'Estagnol
Fiume Po da Rio Boriacco a Bosco Ospizio
Forêts et étangs d'Argonne et vallée de l'Ornain
Gera-Unstrut-Niederung um Straußfurt
Gissaro-Alai open woodlands
Gobi Lakes Valley desert steppe
Golfe du Morbihan
Gorges de la Loire
Gorni Dabnik-Telish
Great Lakes Basin desert steppe
Guizhou Plateau broadleaf and mixed forests
Gulf of Oman desert and semi-desert
Gummandooran saaristo
Hailuoto, pohjoisranta
Hammeniederung
Herbages et cultures des vallées de la Voire, de l'Héronne et de la Laines
Horn of Africa
Huang He Plain mixed forests
Hund und Paapsand
Illyrian deciduous forests
Indo-Burma
Indus River Delta-Arabian Sea mangroves
Inner Galway Bay SPA
Irano-Anatolian
Isomatala-Maasyvänlahti
Italian sclerophyllous and semi-deciduous forests
Jian Nan subtropical evergreen forests
Kaliakra
Kalimok Complex
Kamchia Complex
Kamchiyska Mountain
KATO ROUS KAI EKVOLES SPERCHEIOU POTAMOU
Kazakh semi-desert
Kazakh upland
Kempeleenlahden ranta
Khangai Mountains alpine meadow
Khangai Mountains conifer forests
Khathiar-Gir dry deciduous forests
Kirkkosalmi
Kiskunsági szikes tavak és az õrjegi turjánvidék
KOILADA KAI EKVOLES SPERCHEIOU - MALIAKOS KOLPOS
Kokemäenjoen suisto
Konush Reservoir
Kristiinankaupungin saaristo
l'Albufera
La Durance
LA SOTONERA
Lac de Remoray
Lac du Der
LAC LEMAN
Lacs de la forêt d'Orient
Lago di Mezzola e Pian di Spagna
LAGUNA DE EL HITO
LAGUNA DE FUENTE DE PIEDRA
LAGUNA DE MEDINA
LAGUNA DE SARIÑENA Y BALSA DE LA ESTACIÓN
LAGUNA DEL GOSQUE
Laguna di Venezia
LAGUNAS DE CAMPILLOS
LAGUNAS DE VILLAFÁFILA
LAGUNAS DEL SUR DE CORDOBA
LAGUNAS Y CARRIZALES DE CINCO VILLAS
Lapuanjokisuisto-Bådaviken
Le Marais d'Isle
Les "Cinq Tailles"
LESVOS: KOLPOS KALLONIS KAI CHERSAIA PARAKTIA ZONI
LESVOS: PARAKTIOI YGROTOPOI KOLPOU KALLONIS
Liminganlahti
LIMNES ChEIMADITIDA KAI ZAZARI
LIMNES KAI LIMNOTHALASSES TIS THRAKIS - EVRYTERI PERIOCHI KAI PARAKTIA ZONI
LIMNES KORONEIAS - VOLVIS, STENA RENTINAS KAI EVRYTERI PERIOCHI
LIMNES VISTONIS, ISMARIS - LIMNOTHALASSES PORTO LAGOS, ALYKI PTELEA, XIROLIMNI, KARATZA
LIMNES VOLVI KAI LAGKADA - EVRYTERI PERIOCHI
LIMNI AGIAS (CHANIA)
LIMNI DOIRANI
LIMNI KERKINI - KROUSIA - KORYFES OROUS BELES, ANGISTRO - CHAROPO
LIMNI PETRON
LIMNI PIKROLIMNI - XILOKERATEA
LIMNOS: LIMNES CHORTAROLIMNI KAI ALYKI, KOLPOS MOUDROU, ELOS DIAPORI KAI CHERSONISOS FAKOS
LIMNOTHALASSA AGIOU MAMA
LIMNOTHALASSA KALOGRIAS, DASOS STROFYLIAS KAI ELOS LAMIAS, ARAXOS
LIMNOTHALASSA KOTYCHI - ALYKI LECHAINON
LIMNOTHALASSES STENON LEFKADAS (PALIONIS - AVLIMON) KAI ALYKES LEFKADAS
Llacunes de la Mata i Torrevieja.
Lough Foyle SPA
Lough Swilly SPA
Malabar Coast moist forests
Malko Sharkovo reservoir
Manchurian mixed forests
Mandra - Poda
Marais de l'Erdre
MARAIS POITEVIN
MARISMAS DE ISLA CRISTINA
Marismas de Santoña y Noja
MARISMAS DEL ODIEL
MARISMAS DEL RIO PIEDRAS Y FLECHA DEL ROMPIDO
Marjal de Pego-Oliva.
Marjal dels Moros
Marjal i Estanys d'Almenara
Mechka Fish-ponds
Mediterranean acacia-argania dry woodlands and succulent thickets
Mediterranean Basin
Mediterranean conifer and mixed forests
Mediterranean woodlands and forests
Mesopotamian shrub desert
Mietoistenlahti
Mongolian-Manchurian grassland
Montdúver-Marjal de la Safor
Moore bei Sittensen
Mor Braz
Mountains of Central Asia
Moyenne vallée de l'Oise
Närpiön saaristo
Nenjiang River grassland
Niederung der Unteren Havel
Nile Delta flooded savanna
North Atlantic moist mixed forests
North Bull Island SPA
Northeast China Plain deciduous forests
Northeastern Spain and Southern France Mediterranean forests
Northern Indochina subtropical forests
Northwestern thorn scrub forests
NSG Krombachtalsperre
NSG Urmitzer Werth
Obnova
Ojakylänlahti ja Kengänkari
Olkijokisuu-Pattijoen pohjoishaara
Orsoya Fish-ponds
Ortazzo, Ortazzino, Foce del Torrente Bevano
Ovtcharitsa Reservoir
Parhalahti-Syölätinlahti ja Heinikarinlampi
Perämeren saaret
Persian Gulf desert and semi-desert
Pialassa dei Piomboni, Pineta di Punta Marina
Pialasse Baiona, Risega e Pontazzo
Pindus Mountains mixed forests
PLAINE ET ETANG DU BISCHWALD
Planèze de Saint Flour
Plateau ardennais
Plothener Teiche
Po Basin mixed forests
Pomorie Lake
Pontic steppe
PUNTA ENTINAS-SABINAR
Pyasachnik Reservoir
Qilian Mountains conifer forests
Qin Ling Mountains deciduous forests
Raahen saaristo
Ramsar-Gebiet S-H Wattenmeer und angrenzende Küstengebiete
Red Sea Nubo-Sindian tropical desert and semi-desert
Registan-North Pakistan sandy desert
Rietzer See
Riserva Regionale Lanca di Gerole
Rivière de Pénerf
Rodope montane mixed forests
Ropotamo Complex
Rozov Kladenets Reservoir
S'Albufera de Mallorca
S'Albufera des Grau
Säärenperä ja Karinkannanmatala
Sacca di Goro, Po di Goro, Valle Dindona, Foce del Po di Volano
Sahara desert
Sakar
Salina di Cervia
Salinas de Santa Pola.
Salinas y Arenales de San Pedro del Pinatar
Salzach und Inn
SAMOTHRAKI: OROS FENGARI KAI PARAKTIA ZONI
Sapais de Castro Marim
Sayan Alpine meadows and tundra
Sayan Intermontane steppe
Sayan montane conifer forests
Scandinavian coastal conifer forests
Scandinavian Montane Birch forest and grasslands
Schorfheide-Chorin
Secteur marin de l'île d'Yeu jusqu'au continent
Selenge-Orkhon forest steppe
Ses Salines d'Eivissa i Formentera
Shabla Lake Complex
Siikajoen lintuvedet ja suot
Sologne bourbonnaise
South China-Vietnam subtropical evergreen forests
South Iran Nubo-Sindian desert and semi-desert
South Siberian forest steppe
Southeast Tibet shrub and meadows
Southeastern Iberian shrubs and woodlands
Southern Anatolian montane conifer and deciduous forests
Southern Korea evergreen forests
Southwest Iberian Mediterranean sclerophyllous and mixed forests
Srebarna
Straldzha Complex
Strandzha
Studen Kladenets
Suha Reka
Tacumshin Lake SPA
The Murrough SPA
The Raven SPA
Tian Shan foothill arid steppe
Tian Shan montane conifer forests
Tian Shan montane steppe and meadows
Tigris-Euphrates alluvial salt marsh
Torbiere d'Iseo
Trans-Baikal conifer forests
Tyrrhenian-Adriatic sclerophyllous and mixed forests
U. Rhinluch/Dreetzer See, Havell. Luch und Belziger Landschaftsw.
Unterelbe
Unteres Elbtal
Unteres Odertal
Unterweser
Upper Gangetic Plains moist deciduous forests
Urdaibaiko Itsasadarra / Ría de Urdaibai
Val d'Allier Bourbonnais
Val d'allier Saint Yorre-Joze
Vallazza
Valle Bertuzzi, Valle Porticino - Canneviè
Valle del Mezzano, Valle Pega
Vallée de l'Aisne en aval de Château Porcien
Vallée de la Loire de Iguerande à Decize
Valli di Argenta
Valli di Comacchio
Valli Mirandolesi
Varna-Beloslav Lakes Complex
Vene di Bellocchio, Sacca di Bellocchio, Foce del Fiume Reno, Pineta di Bellocchio
Wangerland
Wesertalaue bei Landesbergen
Western European broadleaf forests
Western Ghats and Sri Lanka
Western Siberian hemiboreal forests
Wexford Harbour and Slobs SPA
Yatata
Yellow Sea saline meadow
YGROTOPOI KALOGRIAS-LAMIAS KAI DASOS STROFYLIAS
YGROTOPOI NEAS FOKAIAS
YGROTOPOS EKVOLON KALAMA KAI NISOS PRASOUDI
YGROTOPOS SCHINIA
Yunnan Plateau subtropical evergreen forests
Zagros Mountains forest steppe
Zaliv Chengene skele
Zhrebchevo Reservoir

Attributes / relations provided by
♦ 1Predation of the shelduck Tadorna tadorna on the mud snail Hydrobia ulvae, N. R. Anders, T. Churchyard, J. G. Hiddink, Aquat Ecol 2009, vol. 43, no. 4, pp. 1193-1199
♦ 2Energy flow of a boreal intertidal ecosystem, the Sylt-Rømø Bight, Dan Baird, Harald Asmus, Ragnhild Asmus, Mar Ecol Prog Ser 279: 45–61, 2004
♦ 3Cirtwill, Alyssa R.; Eklöf, Anna (2018), Data from: Feeding environment and other traits shape species' roles in marine food webs, Dataset, https://doi.org/10.5061/dryad.1mv20r6