Grays Grasshopper Warbler (Locustella fasciolata)

Grays Grasshopper Warbler

[order] PASSERIFORMES | [family] Locustellidae | [latin] Locustella fasciolata | [UK] Grays Grasshopper Warbler | [FR] Locustelle fasciee | [DE] Riesenschwirl | [ES] Buscarla de Gray | [NL] Grote Krekelzanger


Genus Species subspecies Breeding Range Breeding Range 2 Non Breeding Range
Locustella fasciolata EU c, e Southeast Asia, New Guinea
Locustella fasciolata amnicola
Locustella fasciolata fasciolata

Physical charateristics

This is the largest of all the Locustella warblers, approaching the size of the Great Reed Warbler. The adult has an unstreaked olive-brown back, uniformly grey breast and buff underparts, with unmottled dull orange under tail-coverts.

wingspan min.: 21 cm wingspan max.: 24 cm
size min.: 15 cm size max.: 16 cm
incubation min.: 14 days incubation max.: 15 days
fledging min.: 15 days fledging max.: 15 days
broods: 1   eggs min.: 3  
      eggs max.: 4  


Eurasia : Central, East


Breeds in warm dry continental middle latitudes of east Palearctic, mainly in lowland and coastal areas, from fringes of taiga to wooded steppeland, riverain bottomlands, meadows, glades, forest clearings, grassy mountain slopes, and thickets, including bamboo thickets.


The nesting season is very short and occurs mainly from mid-June to early July. The nest is a large deep cup built with dead leaves and stems of dried herbs. It is lined with finer materials such as plant stems and fiber. It is placed on the ground covered with leaves and twigs in high grass or under a small bush. Clutch size is 3 to 4 eggs, which are incubated for about 15 days. Young leave the nest after about 14 days.

Feeding habits

Mainly insects.


This species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
Breeds from upper Ob? and north-east Altai in western Siberia east to Sakhalin island, northern Japan, and Korea. Accidental in France: two 1st-years, both on Ouessant, September 1913 and September 1933. Denmark: juvenile, Lodbjerg, September 1955.
Grays Grasshopper Warbler status Least Concern


The species is migratory. After breeding, they migrate to Siberia and northern regions of Asia reaching the wintering quarters in South-East Asia. During this period, they move to the Philippines, Sulawesi, Maluku and in the western part of New Guinea. Birds of Kuril Islands, Sakhalin and northern Japan followed the same path.

Distribution map

Grays Grasshopper Warbler distribution range map

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