▁are ▁prominent ▁causes ▁of ▁egg ▁mort ality . ▁Between ▁ 3 1 ▁and ▁ 1 0 0 % ▁of ▁n ests ▁with ▁eggs ▁can ▁fail ▁to ▁h atch ▁eggs ▁for ▁these ▁reasons . ▁Ch icks ▁are ▁also ▁pr one ▁to ▁pred ation ▁( est im ated ▁at ▁about ▁ 8 %) ▁and ▁collection ▁at ▁the ▁nest , ▁but ▁more ▁than ▁ 3 0 % ▁die ▁of ▁unknown ▁reasons . ▁ ▁Bre eding ▁success ▁( percent age ▁of ▁eggs ▁h atch ing ▁and ▁surv iving ▁to ▁fled ging ▁stage ) ▁has ▁been ▁estimated ▁at ▁about ▁ 2 0 % ▁in ▁Gu jar at ▁and ▁ 5 1 – 5 8 % ▁in ▁south - western ▁U tt ar ▁Pr adesh . ▁In ▁areas ▁where ▁far mers ▁are ▁toler ant , ▁n ests ▁in ▁flo oded ▁rice ▁fields ▁and ▁those ▁in ▁wet lands ▁have ▁similar ▁rates ▁of ▁surv ival . ▁P airs ▁that ▁nest ▁later ▁in ▁the ▁season ▁have ▁a ▁lower ▁chance ▁of ▁raising ▁ch icks ▁successfully , ▁but ▁this ▁impro ves ▁when ▁territ ories ▁have ▁more ▁wet lands . ▁N est ▁success ▁( percent age ▁of ▁n ests ▁in ▁which ▁at ▁least ▁one ▁egg ▁h atch ed ) ▁for ▁ 9 6 ▁sar us ▁n ests ▁that ▁were ▁protected ▁by ▁loc als ▁during ▁ 2 0 0 9 – 2 0 1 1 ▁via ▁a ▁payment - for - con serv ation ▁program ▁was ▁ 8 7 %. ▁More ▁pairs ▁are ▁able ▁to ▁raise ▁ch icks ▁in ▁years ▁with ▁higher ▁total ▁ra inf all