“…Some birds were already recorded infected with C. formosanus, as Bubulcus ibis coromandus Boddaert, 1783 (Ardeidae), Butorides striata Linnaeus, 1758 (Ardeidae) and Nycticorax nycticorax Linnaeus, 1758 (Ardeidae) (Pinto & Melo 2010). The monitoring data of the Parque do Ingá (Maringá 2007) recorded Butorides striata, and could be a candidate to the definitive host of C. formosanus in this environment, and this species presents a migratory behavior (Brum et al 2016). Among the species occurring in the Parque do Ingá, future investigations are necessary considering the feeding habits of different birds, as Aramides saracura Spix, 1825 (Rallidae), Ardea alba Linnaeus, 1758 (Ardeidae), Egretta thula Molina, 1782 (Ardeidae), Megaceryle torquata Linnaeus, 1766 (Alcedinidae), Nannopterum brasilianus Gmelin, 1789 (Phalacrocoracidae) and Pitangus sulphuratus Linnaeus, 1766 (Tyrannidae), since eventually they could serve as host of C. formosanus.…”