▁the ▁nomin ate ▁from ▁Mad agas car . ▁ ▁Be hav iour ▁ ▁Diet ▁The ▁ha w ks ▁feed ▁on ▁a ▁range ▁of ▁pre y ▁including ▁m amm als , ▁birds , ▁l iz ards , ▁fro gs , ▁and ▁large ▁insect s . ▁They ▁knock ▁small ▁m amm als , ▁l iz ards ▁and ▁f rog ▁off ▁trees ▁or ▁tr unks ▁of ▁trees ▁to ▁shock ▁them ▁and ▁then ▁make ▁the ▁kill . ▁They ▁generally ▁attack ▁flying ▁insect s ▁and ▁birds ▁flying ▁straight ▁towards ▁the ▁pre y ▁and ▁catch ing ▁them ▁in ▁mid - fl ight . ▁ ▁Re production ▁The ▁sp arrow - h aw ks ▁build ▁large ▁stick ▁n ests ▁in ▁the ▁upper ▁fork ▁of ▁large ▁trees ▁usually ▁ 5 ▁- ▁ 1 5 m ▁from ▁the ▁ground . ▁The ▁location ▁of ▁the ▁n ests ▁change ▁from ▁year ▁to ▁year ▁and ▁they ▁usually ▁bre ed ▁in ▁October ▁to ▁December ▁the ▁cl utch ▁var ies ▁from ▁ 3 ▁- ▁ 4 ▁eggs ▁they ▁measure ▁around ▁ 3 7 ▁x ▁ 2 9   mm ▁but ▁the ▁average ▁surv ival ▁rate ▁of ▁the ▁eggs ▁is ▁ 1 . 5 . ▁E gg s ▁usually ▁have ▁different ▁and ▁unique ▁mark ing ▁on ▁them . ▁The ▁eggs ▁are ▁usually ▁a ▁grey ish - white . ▁ ▁Th re ats ▁The ▁Frances ' s ▁sp arrow h awk ▁has ▁no ▁real ▁pred ators . ▁At ▁one ▁point ▁during ▁the ▁ 1 9 0 0 s ▁to ▁ 1 9 8 0 s ▁due ▁to ▁the ▁pre