▁areas ▁in ▁the ▁Canadian ▁pra i ries ▁by ▁its ▁sister ▁organization , ▁D uck s ▁Un limited ▁Canada ▁( DU C ). ▁D UC ▁has ▁since ▁expanded ▁its ▁operations ▁to ▁include ▁projects ▁in ▁every ▁Canadian ▁province ▁and ▁territory , ▁not ▁just ▁in ▁the ▁pra i ries . ▁D uck s ▁Un limited ▁has ▁also ▁expanded ▁its ▁operations ▁to ▁include ▁conservation ▁projects ▁in ▁every ▁state ▁of ▁the ▁United ▁States ▁and ▁in ▁Mexico . ▁It ▁retain s ▁primary ▁focus ▁on ▁habit ats ▁most ▁important ▁to ▁water f ow l ; ▁including ▁the ▁rest oration ▁of ▁du ck ▁bre eding ▁habit ats ▁in ▁Canada ▁and ▁the ▁northern ▁central ▁states , ▁and ▁du ck ▁over w inter ing ▁habitat , ▁mostly ▁in ▁the ▁coast al ▁and ▁southern ▁states ▁and ▁in ▁Mexico . ▁ ▁Method s ▁ ▁Some ▁of ▁the ▁methods ▁used ▁by ▁D uck s ▁Un limited ▁to ▁con serve ▁habit ats ▁are : ▁ ▁Rest oring ▁grass land Gr ass land ▁cover ▁helps ▁h ens ▁conce al ▁their ▁n ests ▁and ▁increases ▁their ▁ch ances ▁of ▁successfully ▁h atch ing ▁a ▁cl utch . ▁This ▁then ▁increases ▁sexual ▁product ivity ▁and ▁height ens ▁the ▁chance ▁of ▁producing ▁off spring . ▁Re plant ing ▁for ests For ests ▁that ▁flo od ▁regularly ▁due ▁to ▁overflow ing ▁river b anks , ▁such ▁as ▁the ▁bottom land ▁hard wood ▁for ests ▁in ▁the ▁Mississippi ▁All uv ial ▁Valley , ▁make ▁for ▁ideal ▁winter ing ▁habitat ▁for ▁du cks , ▁and ▁provide ▁essential ▁bre eding ▁and ▁for aging ▁habitat ▁for