Bird Banding Grand Slam at Bent of the River

The Bent of the River Audubon Center achieved a banding 'grand slam' this year by capturing and banding all four of its focal bird species in a single session. This marked the first such event recorded at the center, according to a report from Audubon Connecticut.

Staff attribute this success to recent, intensive management of the center's Cedar Fields. In the fall, the team removed trees, saplings, and invasive plants from the area. This work aimed to create healthy early successional habitat for the focal species to nest in come spring. The center's regular banding and territory mapping, which provide crucial data similar to a team's stats page, directly informed this management work.

Habitat Management Pays Off

The management was more intensive than work performed in several prior years. The results appeared almost immediately. For example, the number of Prairie Warbler territories in the managed fields jumped from one to five. That is a 400 percent increase, a positive shift in the habitat's 'standings' for that species.

This territorial data adds to the proof shown by the successful banding season. These activities tell staff which species are using the early successional habitat and how they are using it.

The Focal Species

The four focal species banded during the grand slam session were a Prairie Warbler, a Field Sparrow, a Blue-winged Warbler, and an Indigo Bunting. Each bird received a standard USGS aluminum band. They also received a random combination of colored auxiliary bands.

These colored bands help staff identify individual birds in the field without recapturing them. This method allowed for the re-sighting of a record-breaking 12-year-old Blue-winged Warbler in 2025 and again this spring.

Public Participation and Regulation

As summer transitions to autumn, staff will use the collected data to shape their early successional habitat plans for the coming season. The public can contribute to this data. Audubon encourages people to watch for color-banded birds at the Bent of the River center, much like fans tracking player injuries or a club's squad list.

Any sightings, along with the specific arrangements and colors of the bands, should be reported to bentoftheriver@audubon.org. The report notes that bird banding is a highly regulated scientific process. It is strictly conducted by permitted professionals and Audubon's own biologists.