Because it lives in the tops of some of the tallest trees on
the planet, the Hermit Warbler is more easily heard than seen. This flashy,
yellow-headed warbler’s nesting behavior is still largely unknown due to the
dizzying height of its nests, which are placed as high as 120 feet. The species
feeds by gleaning insects from the middle and outer portion of tree branches,
often hovering to capture its prey.
Though Breeding Bird Survey data show that Hermit Warbler
populations have remained stable since the late 1960s, the species faces
threats due to loss and management of habitat on both the breeding and
wintering grounds.
Since Hermit Warblers breed only in coniferous forests with
a well-developed canopy, they are negatively impacted by logging. Hermit
Warblers also hybridize with, and in many cases are being displaced by, the
closely-related Townsend’s Warbler, which has led to its disappearance in
places where it formerly occurred.
Recommended conservation measures for the Hermit Warbler include longer
logging rotations to keep more of the larger trees, and managing coniferous
forests for closed canopies on the bird’s breeding and wintering grounds.
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