▁eat . ▁However , ▁a ▁pair ▁of ▁C arch arod ont osa urus ▁appear ▁from ▁the ▁sh adows ▁and ▁ru in ▁their ▁l unch , ▁much ▁to ▁Dragon fly ' s ▁dis may . ▁ ▁The ▁nest ing ▁ground ▁is ▁a ▁large ▁flat ▁river ▁plain , ▁larger ▁than ▁ 3 ▁football ▁fields . ▁Although ▁Al pha ▁needs ▁to ▁find ▁a ▁spot ▁to ▁lay ▁her ▁eggs , ▁she ' s ▁not ▁the ▁first ▁to ▁arrive , ▁since ▁the ▁older ▁females ▁are ▁veter ans ▁of ▁building ▁n ests . ▁Al pha ▁builds ▁a ▁nest ▁and ▁l ays ▁her ▁eggs ▁for ▁the ▁first ▁time . ▁Then ▁she ▁and ▁the ▁her d ▁head ▁back ▁to ▁the ▁forest ▁to ▁collect ▁bush y ▁leaves ▁to ▁inc ub ate ▁their ▁eggs . ▁ ▁The ▁program ▁j umps ▁back ▁in ▁time ▁ 1 5 ▁years ▁to ▁the ▁same ▁ground , ▁showing ▁how ▁Al pha ' s ▁own ▁story ▁began . ▁ ▁Appro aching ▁the ▁h atch ing ▁period , ▁the ▁nest ing ▁ground ▁is ▁still ▁guard ed ▁by ▁a ▁couple ▁of ▁female ▁Salt as aur us , ▁keeping ▁some ▁potential ▁pl under ers ▁off ▁the ▁n ests . ▁One ▁of ▁these , ▁an ▁Al vare z sa urus , ▁pe cks ▁at ▁an ▁egg ▁while ▁pushing ▁Al pha ' s ▁away . ▁However , ▁a ▁cro cod ile , ▁Not os uch us , ▁sc ares ▁the ▁pl under er ▁off , ▁and ▁pok es ▁a ▁hole ▁in ▁Al pha ' s ▁egg , ▁only ▁to ▁be ▁f ended ▁off ▁by