Birds
Grasshopper Sparrow
Ammodramus savannarum · also called grasshopper sparrows
Walking through a summer grassland, a hiker hears a thin, buzzing trill and assumes it’s just another grasshopper calling nearby, entirely unaware that the actual sound came from a small sparrow perched just out of sight, doing an unusually convincing impression of an insect.
Overview
The grasshopper sparrow, Ammodramus savannarum, is a flat-headed, short-tailed sparrow native to open grassland habitat across a broad range of North, Central, and northern South America. Its uncannily insect-like song and habit of running rather than flying from danger make it one of the more easily overlooked and behaviourally distinctive grassland sparrows on the continent.
A bird that sounds like the insects it eats
Few birds blend into their soundscape as effectively as the grasshopper sparrow, whose buzzy trill mimics the very insects it hunts closely enough that even attentive listeners often assume no bird is involved at all.
Status
Least Concern, though decreasing significantly — present across suitable grassland habitat throughout the Americas, with certain regional subspecies of greater conservation concern.
Grasshopper Sparrow: common questions
Why is the grasshopper sparrow so easy to overlook?
A grasshopper sparrow produces a thin, insect-like buzzing trill so similar to an actual grasshopper's call that the sound is easily mistaken for an insect rather than a bird, and the species also tends to run through dense grass rather than fly when disturbed, making it both hard to hear correctly and hard to see.
Why does the grasshopper sparrow run instead of fly away?
A grasshopper sparrow often prefers to run quickly through dense grass to escape a disturbance rather than immediately flying up, a behaviour that keeps the bird hidden within cover for longer and can make it considerably harder to flush into clear view compared with sparrows that take flight immediately.
Why has the grasshopper sparrow declined so much?
A grasshopper sparrow has experienced significant population declines linked to the widespread loss of native grassland habitat to agriculture and development across North America, with certain regional subspecies facing considerably more serious conservation concern than the species as a whole.
Where does the grasshopper sparrow live?
The grasshopper sparrow is native to open grassland habitat across a broad range of North, Central, and northern South America, generally nesting in a well-concealed ground-level cup nest.