May at Hirundo: A Season of Renewal and Return

Written By: Riley Maker

At Hirundo, May marks a season of transition. The stillness of winter begins to fade as snow melts, wetlands fill, vernal pools begin to fill and create their own little ecosystem, these are signs of new life appear across the landscape. While early May can still feel quiet, changes are already underway setting the stage for one of the most exciting times of year: the return of migratory birds!

As temperatures increase, insects begin to emerge, providing an essential food source for birds returning from their wintering grounds. This shift brings noticeable changes almost overnight. A trail like Wabanaki Trail that seemed quiet one day may be filled with birdsong the next, as migration unfolds in waves throughout the month.

Many familiar species are among the first to return. Visitors may see and hear red-winged blackbirds calling from marshes, American robins foraging along open trails, and song sparrows singing from shrubs and field edges. Eastern phoebes also begin to reappear, often seen perched patiently as they hunt for insects. In wetland areas, great blue herons may be spotted wading through shallow water, while ospreys circle overhead in search of fish.

One especially important species at Hirundo is the Tree Swallow. These small, agile birds return in April and May and are closely connected to Hirundo’s very own bird box monitoring program. Tree Swallows rely on cavity nesting sites, and the boxes maintained at Hirundo provide critical habitat for them to raise their young. Visitors may observe them darting through the air, catching insects in flight, or investigating nesting boxes as they prepare for the breeding season. As more birds arrive, the soundscape at Hirundo begins to change. Each day brings new chirps and squawks. Did you know that birds sing to establish territories and attract mates, creating a dynamic and ever-changing soundtrack across Hirundo’s forests, wetlands, and meadows. Each habitat contributes to something unique, making every visit a different adventure.

Hirundo’s diverse landscape plays a key role in supporting this seasonal activity. Wetlands provide feeding grounds; forests offer shelter, and open areas create space for foraging and nesting. These interconnected habitats allow a wide variety of bird species to thrive during this critical time of year.

For visitors, May is a time of discovery. The changes happening across the refuge can feel subtle at first, but with each visit, the signs of spring become more apparent. Listening for new bird songs, watching movement near water, or simply spending time on the trails can reveal just how quickly the season is unfolding.

May at Hirundo is ultimately a time of renewal. As birds return and the landscape comes back to life, the refuge offers a powerful reminder of nature cycles and the importance of protecting the habitats that make these seasonal transformations possible.