. ▁ ▁Be hav iour ▁ ▁Col on ies ▁are ▁very ▁no isy ▁as ▁they ▁b ray ▁to ▁mark ▁their ▁territory , ▁and ▁also ▁c ack le ▁har sh ly . ▁They ▁use ▁their ▁f anned ▁tail ▁in ▁cour ting ▁displays . ▁ ▁Fe eding ▁The ▁black - brow ed ▁al bat ross ▁fe eds ▁on ▁fish , ▁squ id , ▁cr ust ace ans , ▁car r ion , ▁and ▁fish ery ▁disc ards . ▁This ▁species ▁has ▁been ▁observed ▁ste aling ▁food ▁from ▁other ▁species . ▁ ▁Re production ▁ ▁This ▁species ▁normally ▁n ests ▁on ▁ste ep ▁s lop es ▁covered ▁with ▁t us sock ▁grass ▁and ▁sometimes ▁on ▁cl iffs ; ▁however , ▁on ▁the ▁F alk lands ▁it ▁n ests ▁on ▁flat ▁grass land ▁on ▁the ▁coast . ▁They ▁are ▁an ▁annual ▁bre eder ▁lay ing ▁one ▁egg ▁from ▁between ▁ 2 0 ▁September ▁and ▁ 1 ▁November , ▁although ▁the ▁F alk lands , ▁Cro zet , ▁and ▁Ker g uel en ▁bre ed ers ▁lay ▁about ▁three ▁weeks ▁earlier . ▁Inc ub ation ▁is ▁done ▁by ▁both ▁sex es ▁and ▁last s ▁ 6 8 ▁to ▁ 7 1 ▁days . ▁After ▁h atch ing , ▁the ▁ch icks ▁take ▁ 1 2 0 ▁to ▁ 1 3 0 ▁days ▁to ▁f ledge . ▁Ju ven iles ▁will ▁return ▁to ▁the ▁col ony ▁after ▁two ▁to ▁three ▁years ▁but ▁only ▁to ▁practice ▁court ship ▁rit uals , ▁as ▁they ▁start ▁bre eding ▁around ▁the ▁ 1