Birds
Chestnut-Sided Warbler
Setophaga pensylvanica · also called chestnut-sided warblers
A cheerful “pleased, pleased, pleased to meetcha” rings out from a patch of regrowing forest, and the source, a chestnut-sided warbler, owes its comfortable abundance today to exactly the kind of shrubby, cleared landscape that historical old-growth forest never used to provide.
Overview
The chestnut-sided warbler, Setophaga pensylvanica, is a distinctively marked songbird native to shrubby second-growth forest habitat across the northeastern United States and southeastern Canada. Its historical rarity before European settlement, memorable easily-learned song, and status as one of the few forest birds that actually benefited from widespread logging make it one of the more ecologically interesting warblers in eastern North America.
A species that logging helped, not hurt
While countless forest-interior birds suffered as old-growth forest was cleared across the East, the chestnut-sided warbler found exactly the shrubby, regrowing habitat it needed, becoming considerably more common as a direct result of that same disturbance.
Status
Least Concern — widespread and stable across suitable shrubby second-growth habitat throughout the northeastern United States and southeastern Canada.
Chestnut-Sided Warbler: common questions
Why was the chestnut-sided warbler rare before European settlement?
This species favours shrubby, second-growth habitat rather than mature closed-canopy forest, and before widespread logging created large areas of this early successional vegetation, suitable habitat was considerably more limited across the primarily old-growth forested landscape of eastern North America.
What does the chestnut-sided warbler's song sound like?
It produces a cheerful, easily learned song often rendered by birders as "pleased, pleased, pleased to meetcha," one of the more approachable and memorable warbler songs for beginners trying to learn bird calls by ear.
How can you identify a chestnut-sided warbler?
Look for a distinctive chestnut-coloured streak running along the sides paired with a bright yellow cap on the male, along with a habit of holding the tail cocked upward while foraging, a posture that can aid identification even from a distance.
Where does the chestnut-sided warbler prefer to breed?
This species breeds in shrubby, early successional forest habitat such as regrowing clearings and forest edges across the northeastern United States and southeastern Canada, rather than the mature, closed-canopy forest many other warbler species prefer.