f ow l ▁collection ▁in ▁St . ▁James ' s ▁Park . ▁They ▁were ▁introduced ▁in ▁Germany ▁and ▁Sc and in avia ▁during ▁the ▁ 2 0 th ▁century , ▁starting ▁in ▁Sweden ▁in ▁ 1 9 2 9 . ▁In ▁Britain , ▁they ▁were ▁spread ▁by ▁hun ters , ▁but ▁remained ▁un common ▁until ▁the ▁mid - 2 0 th ▁century . ▁Their ▁population ▁grew ▁from ▁ 2 2 0 0 ▁to ▁ 4 0 0 0 ▁birds ▁in ▁ 1 9 5 3 ▁to ▁an ▁estimated ▁ 8 2 , 0 0 0 ▁in ▁ 1 9 9 9 , ▁as ▁changing ▁agricult ural ▁practices ▁and ▁urban ▁growth ▁provided ▁new ▁habitat . ▁European ▁birds ▁are ▁mostly ▁desc ended ▁from ▁the ▁sub species ▁B . ▁c . ▁canad ensis , ▁likely ▁with ▁some ▁contributions ▁from ▁the ▁sub species ▁B . ▁c . ▁maxim a . ▁ ▁New ▁Zealand ▁ ▁Canada ▁ge ese ▁were ▁introduced ▁as ▁a ▁game ▁bird ▁into ▁New ▁Zealand ▁in ▁ 1 9 0 5 . ▁They ▁have ▁become ▁a ▁problem ▁in ▁some ▁areas ▁by ▁fou ling ▁past ures ▁and ▁dam aging ▁cro ps . ▁They ▁were ▁protected ▁under ▁the ▁Wild life ▁Act ▁ 1 9 5 3 ▁and ▁the ▁population ▁was ▁managed ▁by ▁Fish ▁and ▁Game ▁New ▁Zealand , ▁which ▁cul led ▁excess ive ▁bird ▁numbers . ▁In ▁ 2 0 1 1 , ▁the ▁government ▁removed ▁the ▁protection ▁status , ▁allowing ▁anyone ▁to ▁kill ▁the ▁birds . ▁ ▁Finland ▁The ▁Canada ▁go ose ▁was ▁first ▁brought ▁to ▁Finland