In the 1970s, when we were young and thought we were immortal, Erika and I pursued our doctoral research in the eastern lowland Ecuadorian jungle. I studied antbirds, a widespread tropical American family of birds that follow army ant swarms and feed off the arthropods fleeing from the ants. The Ornate Antwren, below, is an example of an antbird.
Meanwhile, Erika studied the effects of intercontinental migration on the trematode fauna of Solitary and Pectoral Sandpipers. These sandpipers breed in Canada and winter in South America. The bird below is a Solitary Sandpiper.
Being of boundless energy, Erika and I also collected trematodes from my antbirds. In effect, this study amounted to our doing a third dissertation! There are two different feeding strategies among the antbirds, those that feed in the bushes, and those that always feed while walking on the ground, like the Striated Ant-thrush you see here: