Correspondence relationship between avian frugivores and Cayratia japonica based on feeding behavior. Widths of connecting lines denote the number of observed interactions (wider represents higher intensity of visiting). Avian frugivores: A, Pycnonotus xanthorrhous; B, Zosterops japonicus; C, Pycnonotus sinensis; D, Hemixos castanonotus; E, Hypsipetes mcclellandii; F, Urocissa erythrorhyncha; G, Turdus merula; H, Streptopelia orientalis; I, Parus venustulus; K, Parus major; J, Pycnonotus jocosus.