▁are ▁considered ▁symbols ▁of ▁mar ital ▁f idel ity , ▁believed ▁to ▁mate ▁for ▁life ▁and ▁p ine ▁the ▁loss ▁of ▁their ▁m ates ▁even ▁to ▁the ▁point ▁of ▁star ving ▁to ▁death . ▁ ▁The ▁main ▁bre eding ▁season ▁is ▁during ▁the ▁ra iny ▁season , ▁when ▁the ▁pair ▁builds ▁an ▁enorm ous ▁nest ▁" is land ", ▁a ▁circular ▁platform ▁of ▁re eds ▁and ▁grass es ▁nearly ▁ 2 ▁m ▁in ▁diameter ▁and ▁high ▁enough ▁to ▁stay ▁above ▁the ▁shall ow ▁water ▁surrounding ▁it . ▁In cre ased ▁agricult ural ▁intensity ▁is ▁often ▁thought ▁to ▁have ▁led ▁to ▁decl ines ▁in ▁sar us ▁c rane ▁numbers ▁but ▁they ▁also ▁benefit ▁from ▁wet land ▁cro ps ▁and ▁the ▁construction ▁of ▁can als ▁and ▁res er voir s . ▁The ▁strong hold ▁of ▁the ▁species ▁is ▁in ▁India , ▁where ▁it ▁is ▁tradition ally ▁rever ed ▁and ▁lives ▁in ▁agricult ural ▁lands ▁in ▁close ▁proxim ity ▁to ▁humans . ▁Else where , ▁the ▁species ▁has ▁been ▁ext ir p ated ▁in ▁many ▁parts ▁of ▁its ▁former ▁range . ▁ ▁Description ▁▁ ▁The ▁adult ▁sar us ▁c rane ▁is ▁very ▁large ▁with ▁grey ▁wings ▁and ▁body , ▁a ▁bare ▁red ▁head ▁and ▁part ▁of ▁the ▁upper ▁neck ; ▁a ▁grey ish ▁crown , ▁and ▁a ▁long ▁green ish - gre y ▁pointed ▁bill . ▁In ▁flight , ▁the ▁long ▁neck ▁is ▁held ▁straight , ▁unlike ▁that ▁of ▁a ▁her on , ▁which ▁fol ds ▁it ▁back , ▁and ▁the ▁black ▁wing ▁tips ▁can ▁be