Warbling Vireos are rather plain greenish-gray birds with an indistinct eyebrow line. As with all vireos--and unlike the hyperactive warblers--vireos move sluggishly through the tree canopy. Even though they aren't very large or active, they sing non-stop throughout the day and breeding season. In early afternoon they may be one of the few birds singing.
Two of the three photos below show the bird singing as it moves through the foliage at Palomar Mountain.
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Warbling Vireo. Palomar Mountain, California. June 17, 2018. |
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