Phragmites australis has been replacing resident vegetation communities in the coastal marshes of Long Point, ON since the late 1990s. In 2016, the Ontario government and partners began an ambitious project to reduce P. australis cover using, primarily, the application of a glyphosate-based herbicide. While herbicide is a common tool in the fight against invasive plants, we often do not know how wetland species will react to the removal of an established invasive species. This research compares aquatic and emerging invertebrates (e.g., mayflies) among P. australis habitat, resident vegetation, and in herbicide-treated sites. The researcher also paired a measurement of aerial insectivore birds’ (e.g., swallows) foraging activity to measurements of prey availability to determine how swallows are using marshes after treatment. This is especially important as aerial insectivore birds are in decline across North America and the outcome of controlling P. australis in their foraging habitat is unclear.