or ), ▁sometimes ▁placed ▁in ▁the ▁genus ▁A gy rt ria , ▁is ▁a ▁species ▁of ▁hum ming bird ▁from ▁central ▁and ▁eastern ▁South ▁America . ▁ ▁Tax onomy ▁ ▁The ▁tax onomy ▁is ▁very ▁complex ▁and ▁remains ▁a ▁matter ▁of ▁dispute . ▁The ▁nomin ate ▁sub species ▁( A . ▁v . ▁vers icol or ) ▁occurs ▁in ▁two ▁main ▁morph s ; ▁a ▁white - th ro ated ▁coast al ▁type ▁and ▁a ▁green / t ur qu o ise - th ro ated ▁in land ▁type . ▁At ▁some ▁local ities ▁individuals ▁with ▁intermediate ▁features ▁are ▁commonly ▁seen , ▁but ▁at ▁others ▁the ▁two ▁morph s ▁seem ingly ▁co - oc cur ▁without ▁signs ▁of ▁inter grad ation . ▁The ▁coast al ▁morph ▁was ▁formerly ▁known ▁as ▁A . ▁bre vi ro str is , ▁but ▁a ▁review ▁lead ▁to ▁this ▁name ▁being ▁considered ▁to ▁belong ▁to ▁the ▁white - ch ested ▁emer ald ▁of ▁northern ▁South ▁America . ▁Rec ently , ▁it ▁has ▁been ▁suggested ▁that ▁the ▁coast al ▁type ▁should ▁remain ▁as ▁A . ▁bre vi ro str is , ▁but ▁this ▁has ▁been ▁disput ed , ▁and ▁has ▁yet ▁to ▁gain ▁wide ▁recognition . ▁ ▁The ▁exact ▁distribution ▁limits ▁between ▁several ▁sub species ▁of ▁the ▁vers icol oured ▁emer ald ▁are ▁poor ly ▁known , ▁and , ▁in ▁addition ▁to ▁the ▁coast al ▁nomin ate , ▁some ▁other ▁sub species ▁have ▁been ▁considered ▁separate ▁species , ▁especially ▁the ▁blue - green ▁emer ald ▁( A . ▁(