This is usually understood as warning behavior by loons. If you see a loon doing this on the lake, it means you are too close and should back off. Many thanks to Jeramy Paxton for sending these pictures.
In the Media
Lake Iroquois Project Featured in Vermont Business Magazine
A recent Vermont Business Magazine article highlighted improvements made to Beebe Lane, the road that leads to the Lake Iroquois public beach. The project, led by the Lake Iroquois Recreation District and supported by the Chittenden County Regional Planning Commission, added drainage features like culverts, swales, and ditch turnouts to help control stormwater runoff from the gravel road. These improvements help keep sediment and phosphorus out of Lake Iroquois and protect water quality. You can read the full story using the following link: https://vermontbiz.com/news/2026/march/12/water-quality-projects-chittenden-county-and-after