Host Reactions in Young Birds to Naturally Occurring Superinfestations with Porrocaecum ensicaudatum

The young of all nest dwelling birds are fed continuously by their parents. It is the latter therefore who choose the food which is mostly composed of that which the adult birds feed on. Under these circumstances it is therefore not surprising that fledglings when still in the nest are found to harbour helminths of which the larval forms were contained in the foo