, ▁who ▁would ▁later ▁be ▁involved ▁in ▁the ▁conservation ▁movement . ▁In ▁ 1 9 3 0 , ▁Joseph ▁P . ▁Kn app , ▁a ▁publishing ▁ty co on ▁who ▁successfully ▁obtained ▁such ▁notable ▁publications ▁as ▁The ▁Associ ated ▁Sunday ▁Magazine , ▁Crow ell ▁Publishing ▁Company , ▁Col lier ’ s ▁Week ly , ▁Farm ▁and ▁F ires ide , ▁and ▁the ▁book ▁publish er ▁P . F . ▁Col lier ▁& ▁S ons , ▁founded ▁More ▁Game ▁Bird s ▁in ▁America ▁and ▁American ▁Wild ▁F ow lers ▁was ▁quickly ▁absor bed ▁into ▁the ▁new ▁organization . ▁ ▁In ▁ 1 9 3 7 , ▁Kn app , ▁Robert ▁Win th rop , ▁and ▁a ▁small ▁group ▁of ▁conservation ▁phil anth rop ists ▁decided ▁to ▁focus ▁on ▁the ▁decre asing ▁water f ow l ▁populations , ▁and ▁the ▁habitat ▁necessary ▁to ▁sust ain ▁them ▁in ▁Canada . ▁D uck s ▁Un limited ▁was ▁incorpor ated ▁on ▁January ▁ 2 9 , ▁ 1 9 3 7 . ▁More ▁Game ▁Bird s ▁in ▁America ▁was ▁then ▁absor bed ▁by ▁the ▁new ▁water f ow l ▁organization . ▁D uck s ▁Un limited ▁Canada ▁was ▁incorpor ated ▁in ▁W inn ip eg , ▁Man it oba , ▁on ▁March ▁ 1 0 , ▁ 1 9 3 7 . ▁ ▁D uck s ▁Un limited ▁also ▁works ▁in ▁Mexico ▁through ▁their ▁sister ▁organization , ▁D uck s ▁Un limited ▁de ▁Mexico . ▁Other ▁chap ters ▁have ▁since ▁begun ▁operation ▁in ▁Latin ▁America , ▁Mexico ,