ar ▁stage , ▁they ▁transition ▁to ▁a ▁light ▁yellow ▁color . ▁Ad ult ▁spr uce ▁bud ▁moth s ▁have ▁dark ▁wings ▁and ▁a ▁wings pan ▁of ▁half ▁an ▁in ch . ▁ ▁Fl ight ▁ ▁The ▁spr uce ▁bud ▁moth ▁has ▁a ▁rapid ▁flutter ing ▁wing ▁motion ▁when ▁flying . ▁They ▁typically ▁fly ▁low ▁during ▁the ▁day ▁and ▁fly ▁higher ▁over ▁the ▁branches ▁of ▁the ▁spr uce ▁tree ▁after ▁the ▁sun ▁has ▁set ▁and ▁the ▁temperature ▁has ▁dropped , ▁as ▁they ▁mate ▁after ▁dark ▁due ▁to ▁sens itivity ▁to ▁high ▁temper atures . ▁ ▁Inter actions ▁with ▁humans ▁ ▁As ▁p ests ▁ ▁The ▁spr uce ▁bud ▁moth ▁def oli ates ▁young ▁white ▁spr uce ▁trees , ▁and ▁after ▁ 1 9 8 0 , ▁upon ▁the ▁plant ation ▁of ▁extensive ▁regions ▁of ▁white ▁spr uce , ▁has ▁been ▁considered ▁a ▁p est . ▁As ▁mentioned , ▁the ▁lar va e ▁of ▁the ▁spr uce ▁bud ▁moth , ▁in ▁particular , ▁de form ▁the ▁bud s ▁of ▁the ▁spr uce ▁tree ▁greatly , ▁specifically ▁destroy ing ▁the ▁cort ical ▁t issue ▁and ▁crown ▁of ▁the ▁tree , ▁weak ening ▁sho ots , ▁and ▁causing ▁tree ▁height ▁loss . ▁Ze i raph era ▁canad ensis ▁has ▁caused ▁a ▁high ▁inc idence ▁of ▁multiple ▁and ▁ab normal ▁leaders ▁in ▁white ▁spr uce ▁in ▁the ▁Mar itime ▁provinces , ▁Quebec , ▁and ▁Maine . ▁However , ▁although ▁severe ▁feed ing ▁damage ▁has ▁s eld om ▁been ▁extensive ▁in ▁for ests , ▁new ▁sho ots ▁on ▁open