 The corn crake is mainly a lowland species , but breeds up to 1 @,@ 400 m ( 4 @,@ 600 ft ) altitude in the Alps , 2 @,@ 700 m ( 8 @,@ 900 ft ) in China and 3 @,@ 000 m ( 9 @,@ 800 ft ) in Russia . When breeding in Eurasia , the corn crake 's habitats would originally have included river meadows with tall grass and meadow plants including sedges and irises . It is now mainly found in cool moist grassland used for the production of hay , particularly moist traditional farmland with limited cutting or fertiliser use . It also utilises other treeless grasslands in mountains or taiga , on coasts , or where created by fire . Moister areas like wetland edges may be used , but very wet habitats are avoided , as are open areas and those with vegetation more than 50 cm ( 20 in ) tall , or too dense to walk through . The odd bush or hedge may be used as a calling post . Grassland which is not mown or grazed becomes too matted to be suitable for nesting , but locally crops such as cereals , peas , rape , clover or potatoes may be used . After breeding , adults move to taller vegetation such as common reed , iris , or nettles to moult , returning to the hay and silage meadows for the second brood . In China , flax is also used for nest sites . Although males often sing in intensively managed grass or cereal crops , successful breeding is uncommon , and nests in the field margins or nearby fallow ground are more likely to succeed . 
 The corn crake <a href='drop_aux' title='1'><mark>is</mark></a>mainly a lowland species , but <a href='uninflect' title='2'><mark>breeds</mark></a> up to 1 @,@ 400 m ( 4 @,@ 600 ft ) altitude in the Alps , 2 @,@ 700 m ( 8 @,@ 900 ft ) in China and 3 @,@ 000 m ( 9 @,@ 800 ft ) in Russia . When breeding in Eurasia , the corn crake <a href='null_genetive' title='3'><mark>'s</mark></a>habitats would originally <a href='been_done' title='4'><mark>have</mark></a> included river meadows with tall grass and meadow plants including sedges and irises . It is now mainly found in cool moist grassland used for the production of hay , particularly moist traditional farmland with limited cutting or fertiliser use . It also <a href='uninflect' title='5'><mark>utilises</mark></a> other treeless grasslands in mountains or taiga , on coasts , or where created by fire . Moister areas like wetland edges may be used , but very wet habitats are avoided , as are open areas and those with vegetation more than 50 cm ( 20 in ) tall , or too dense to walk through . The odd bush or hedge may be used as a calling post . Grassland which is not mown or grazed <a href='uninflect' title='6'><mark>becomes</mark></a> too matted to be suitable for nesting , but locally crops such as cereals , peas , rape , clover or potatoes may be used . After breeding , adults move to taller vegetation such as common reed , iris , or nettles to moult , returning to the hay and silage meadows for the second brood . In China , flax is also used for nest sites . Although males often sing in intensively managed grass or cereal crops , successful breeding <a href='drop_aux' title='7'><mark>is</mark></a>uncommon , and nests in the field margins or nearby fallow ground <a href='drop_aux' title='8'><mark>are</mark></a>more likely to succeed . 
The corn crake mainly a lowland species , but breed up to 1 @,@ 400 m ( 4 @,@ 600 ft ) altitude in the Alps , 2 @,@ 700 m ( 8 @,@ 900 ft ) in China and 3 @,@ 000 m ( 9 @,@ 800 ft ) in Russia . When breeding in Eurasia , the corn crake  habitats would originally done included river meadows with tall grass and meadow plants including sedges and irises . It is now mainly found in coo moist grassland used for da production of hay , particularly moist traditional farmland w/ limited cuttin or fertiliser use . It also utilise other treeless grasslands in mountains or taiga , on coasts , or where created by fire . Moister areas like wetland edges may be used , but very wet habitats are avoided , as are open areas and those with vegetation more than 50 cm ( 20 in ) tall , or too dense to walk thru . The odd bush or hedge may b used as a calling post . Grassland which ain't mown or grazed become too matted to bbsuitable fa nesting , but locally crops such as cereals , peas , rape , clover or potatoes may bebsed . After breeding , adults move to taller vegetation such as common reed , iris , or nettles to moult , returning to the hay and silage meadows for tdasecond brood . In China , flax is also used ffanest sites . Although males often sing in intensively managed grass or cereal crops , successful breeding uncommon , and nests in the field margins or nearby fallow ground more likely to succeed .