HelminthiasisBirdsHelminthiasis, AnimalHelminthsNeglected DiseasesAscaris lumbricoidesAnthelminticsTrichurisAscariasisAncylostomatoideaTrichuriasisMagicSierra LeoneSoilIntestinal Diseases, ParasiticToilet FacilitiesHookworm InfectionsStrongyloides stercoralisDuddingtoniaNecator americanusSchistosomiasisCentral Nervous System HelminthiasisAncylostomaAlbendazoleFecesPraziquantelParasite Egg CountHygienePrevalenceNigeriaPasseriformesSongbirdsAnimal MigrationCross-Sectional StudiesFeathersCharadriiformesFlight, AnimalPsittaciformesAnimals, Wild