Figure 4

Undirected weighted network based on 87 observation sessions on duck foraging areas, leading to 1761 individual observations of 36 species or groups of species. Nodes are each species (or group), edges are observed interactions (co-occurrence) between two species. Nodes are coloured and shaped by community and sized by degree (number of contact-species), and arranged to show the most connexions as possible. Interactions with ducks are highlighted in green. Edge thickness is relative to their weight, i.e. their relative frequency in the total number of observation sessions. Species names are coded as follows: Ducks: Domestic ducks; AEGCAU: Aegithalos caudatus; ANT spp: Anthus spp.;ARDCIN: Ardea cinerea; BUTBUT: Buteo buteo; CARCHL: Chloris chloris; CARLIS: Carduelis carduelis; CERBRA: Certhia brachydactyla; COLBUS: Columba palumbus; COLLIV: Columba livia; CORONE: Corvus corone; CUCCAN: Cuculus canorus; ELACAE: Elanus caeruleus; EMB spp: Emberiza spp.; ERIRUB: Erithacus rubecula; FICUCA: Ficedula hypoleuca; FRICOE: Fringilla coelebs; GARGLA: Garrulus glandarius; LUSMEG: Luscinia megarhynchos; MOTALB: Motacilla alba; MOTCIN: Motacilla cinerea; PARCAE: Cyanistes caeruleus; PARMAJ: Parus major; PAS spp.: Passer domesticus & P. montanus; PHOOCH: Phoenicurus ochruros; PHYCOL: Phylloscopus collybita; PIC spp.: Picidae; PICPIC: Pica pica; SAXTOR: Saxicola rubicola; SITEUR: Sitta europea; STRCTO: Streptopelia decaocto; STUVUL: Sturnus vulgaris; SYLATR: Sylvia atricapilla; SYLCOM: Sylvia communis; TURMER: Turdus merula; UPUEPO: Upupa epops.