Henslow's Sparrow is one of the most range-restricted and declining grassland sparrows in North America, with a weak, hiccup-like 'tsi-lick' song that is easy to miss. It has an unusually large, flat olive head relative to its body. It requires large patches of ungrazed or lightly grazed grassland with accumulated thatch, a habitat type that has diminished severely.
Best time to see a Henslow's Sparrow
The best time to see a Henslow's Sparrow is May–July, when about 69% of U.S. sightings happen, based on 1,769 research-grade iNaturalist observations.
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Recent Henslow's Sparrow sightings near you
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