“…In Israel, Pelecanus onocrotalus was found infected with adult stages of both C. quadripapillatum and C. multipapillatum E ( Caffara et al, 2023 ), highlighting its role as definitive host of these Contracaecum species. P. onocrotalus migrate from the Danube Delta to wintering sites in Africa, stopping for several days in Israel to rest and feed; however, wetland deterioration has negatively affected long-distance migrating birds' ability to find suitable areas to stop over ( Arad, 2021 ).…”