▁Tre aty ▁Act , ▁and ▁in ▁Canada ▁under ▁the ▁Mig rat ory ▁Bird s ▁Convention ▁Act . ▁In ▁both ▁countries , ▁commercial ▁transactions ▁such ▁as ▁bu ying ▁or ▁trad ing ▁are ▁mostly ▁prohib ited ▁and ▁the ▁possession , ▁hunting , ▁and ▁inter fer ing ▁with ▁the ▁activity ▁of ▁the ▁animals ▁are ▁subject ▁to ▁restrictions . ▁In ▁the ▁UK , ▁as ▁with ▁native ▁bird ▁species , ▁the ▁n ests ▁and ▁eggs ▁of ▁Canada ▁ge ese ▁are ▁fully ▁protected ▁by ▁law , ▁except ▁when ▁their ▁removal ▁has ▁been ▁specifically ▁lic ensed , ▁and ▁shooting ▁is ▁generally ▁permitted ▁only ▁during ▁the ▁defined ▁open ▁season . ▁ ▁Ge ese ▁have ▁a ▁t endency ▁to ▁attack ▁humans ▁when ▁they ▁feel ▁themselves ▁or ▁their ▁g os lings ▁to ▁be ▁threatened . ▁First , ▁the ▁ge ese ▁stand ▁ere ct , ▁spread ▁their ▁wings , ▁and ▁produce ▁a ▁his sing ▁sound . ▁Next , ▁the ▁ge ese ▁charge . ▁They ▁may ▁then ▁b ite ▁or ▁attack ▁with ▁their ▁wings . ▁ ▁A ircraft ▁strik es ▁Canada ▁ge ese ▁have ▁been ▁imp licated ▁in ▁a ▁number ▁of ▁bird ▁strik es ▁by ▁aircraft . ▁Their ▁large ▁size ▁and ▁t endency ▁to ▁fly ▁in ▁f lock s ▁may ▁ex ac erb ate ▁their ▁impact . ▁In ▁the ▁United ▁States , ▁the ▁Canada ▁go ose ▁is ▁the ▁second - most ▁dam aging ▁bird ▁strike ▁to ▁air plan es , ▁with ▁the ▁most ▁dam aging ▁being ▁tur key ▁v ult ures . ▁Canada ▁ge ese ▁can ▁cause ▁fatal ▁crashes ▁when ▁they ▁strike ▁an ▁aircraft '