, ▁members ▁of ▁the ▁Ar de idae ▁fly ▁with ▁their ▁ne cks ▁pulled ▁back ▁into ▁a ▁curve . ▁ ▁Grey ▁her on , ▁Ar de a ▁cin erea ▁Pur ple ▁her on , ▁Ar de a ▁pur p ure a ▁Great ▁eg ret , ▁Ar de a ▁al ba ▁Little ▁eg ret , ▁E gre tta ▁gar zet ta ▁S qu acco ▁her on , ▁Ar de ola ▁r allo ides ▁C attle ▁eg ret , ▁B ub ul cus ▁i bis ▁Black - c rown ed ▁night ▁her on , ▁Ny ctic or ax ▁ny ctic or ax ▁Little ▁bit tern , ▁I x ob ry chus ▁min ut us ▁Great ▁bit tern , ▁B ota urus ▁stell aris ▁ ▁St ork s ▁Order : ▁C icon i iformes Family : ▁C icon i idae ▁ ▁St ork s ▁are ▁large , ▁long - leg ged , ▁long - ne ck ed , ▁w ading ▁birds ▁with ▁long , ▁st out ▁b ills . ▁St ork s ▁are ▁m ute , ▁but ▁bill - cl atter ing ▁is ▁an ▁important ▁mode ▁of ▁communication ▁at ▁the ▁nest . ▁Their ▁n ests ▁can ▁be ▁large ▁and ▁may ▁be ▁re used ▁for ▁many ▁years . ▁Many ▁species ▁are ▁mig rat ory . ▁ ▁Black ▁st ork , ▁C icon ia ▁n ig ra ▁White ▁st ork , ▁C icon ia ▁c icon ia ▁ ▁Ib ises ▁and ▁sp oon b ills ▁Order : ▁Pe le can iformes Family : ▁Th res ki orn ith idae