 The female corn crake may give a call that is similar to that of the male ; it also has a distinctive barking sound , similar in rhythm to the main call but without the grating quality . The female also has a high @-@ pitched cheep call , and a oo @-@ oo @-@ oo sound to call the chick . The chicks make a quiet peeick @-@ peeick contact call , and a chirp used to beg for food . Because of the difficulty in seeing this species , it is usually censused by counting males calling between 11 pm and 3 am ; the birds do not move much at night , whereas they may wander up to 600 m ( 660 yd ) during the day , which could lead to double @-@ counting if monitored then . Identifying individual males suggests that just counting calling birds underestimates the true count by nearly 30 % , and the discrepancy is likely to be greater , since only 80 % of males may call at all on a given night . The corn crake is silent in Africa . 
 The female corn crake may give a call <a href='null_relcl' title='1'><mark>that</mark></a><a href='drop_aux' title='2'><mark>is</mark></a>similar to that of the male ; it also <a href='got' title='3'><mark>has</mark></a> a distinctive barking sound , similar in rhythm to the main call but without the grating quality . The female also <a href='got' title='4'><mark>has</mark></a> a high @-@ pitched cheep call , and a oo @-@ oo @-@ oo sound to call the chick . The chicks make a quiet peeick @-@ peeick contact call , and a chirp used to beg for food . Because of the difficulty in seeing this species , it is usually censused by counting males calling between 11 pm and 3 am ; the birds do not move much at <a href='negative_concord' title='5'><mark>night</mark></a> , whereas they may wander up to 600 m ( 660 yd ) during the day , which could lead to double @-@ counting if monitored then . Identifying individual males <a href='uninflect' title='6'><mark>suggests</mark></a> that just counting calling birds <a href='uninflect' title='7'><mark>underestimates</mark></a> the true count by nearly 30 % , and the discrepancy <a href='drop_aux' title='8'><mark>is</mark></a>likely to be greater , since only 80 % of males may call at all on a given night . The corn crake <a href='drop_aux' title='9'><mark>is</mark></a>silent in Africa . 
Da female corn crake may give a call similar to dat of the male ; it also got a distinctive barkin sound , similar in rhythm to the main call but without the grating quality . The female also got a high @-@ pitched cheep call , and a oo @-@ oo @-@ oo sound to call the chick . The chicks make a quiet peeick @-@ peeick contact call , and a chirp used to beg for food . Because of tdadifficulty in seeing dis species , it is usually censused by counting males calling between 11 pm and 3 am ; thdairds do not move much at no night , whereas they may wander up to 600 m ( 660 yd ) durin the day , which could lead to double @-@ countin if monitored then . Identifying individual males suggest tdatjus ccountincalling birds underestimate the true count by nearly 30 % , and the discrepancy likely to b greater , since only 80 % of males may call at all on a given night . Thedarn crake silent in Africa .