am ous ▁bre eding ▁system ▁in ▁which ▁a ▁male ▁and ▁a ▁female ▁form ▁a ▁pair ▁and ▁establish ▁a ▁territory ▁that ▁they ▁maintain . ▁Fem ales , ▁however , ▁can ▁abandon ▁their ▁n ests ▁sometimes ▁to ▁bre ed ▁with ▁other ▁males . ▁M ales ▁generally ▁do ▁not ▁leave ▁their ▁territ ories . ▁Both ▁males ▁and ▁females ▁take ▁part ▁in ▁territorial ▁disput es . ▁They ▁fly ▁around ▁their ▁territory ▁and ▁let ▁out ▁loud ▁calls . ▁They ▁pu ff ▁their ▁ch est , ▁and ▁often ▁jump , ▁and ▁pe ck ▁to ▁w ard ▁off ▁any ▁unw el coming ▁intr uder . ▁M ales ▁begin ▁their ▁bre eding ▁activity ▁towards ▁the ▁end ▁of ▁February ▁or ▁in ▁early ▁March . ▁The ▁male ▁disp laces ▁gra vel ▁with ▁its ▁feet ▁and ▁makes ▁a ▁shall ow ▁pit ▁or ▁de pression , ▁about ▁ 4 ▁cent im eters ▁deep ▁and ▁ 1 3 ▁cent im eters ▁in ▁diameter , ▁by ▁pressing ▁its ▁ch est ▁against ▁the ▁ground . ▁The ▁male ▁attract s ▁a ▁female ▁by ▁calling ▁her . ▁When ▁a ▁female ▁comes ▁to ▁the ▁nest , ▁the ▁male ▁spread s ▁his ▁tail ▁for ▁court ship ▁display . ▁The ▁female ▁passes ▁under ▁the ▁tail ▁of ▁the ▁male ▁and ▁enters ▁the ▁nest . ▁The ▁male ▁makes ▁many ▁of ▁these ▁p its ▁on ▁the ▁ground ▁and ▁gu ides ▁the ▁female ▁from ▁one ▁pit ▁to ▁another , ▁and ▁the ▁female ▁eventually ▁l ays ▁eggs ▁in ▁one ▁of ▁n ests . ▁The ▁female ▁l ays ▁one ▁egg ▁every ▁ 4 8 ▁hours ▁until ▁she ▁has ▁a