▁P . ▁stan ley i ▁ ▁as ▁a ▁junior ▁syn onym ▁of ▁that ▁bird ) ▁from ▁New ▁Zealand . ▁In ▁ 1 9 9 1 , ▁the ▁orn ith ologist ▁Ian ▁H utton ▁reported ▁sub f oss il ▁b ones ▁of ▁the ▁Lord ▁How e ▁sw am phen . ▁H utton ▁agreed ▁that ▁the ▁birds ▁described ▁as ▁having ▁white - and - blue ▁fe athers ▁were ▁hy br ids ▁between ▁the ▁Lord ▁How e ▁sw am phen ▁and ▁the ▁Austral as ian ▁sw am phen , ▁an ▁idea ▁also ▁considered ▁by ▁the ▁orn ith olog ists ▁Barry ▁Taylor ▁and ▁Ber ▁van ▁Per lo ▁in ▁ 2 0 0 0 . ▁In ▁ 2 0 0 0 , ▁the ▁writer ▁Er rol ▁Full er ▁said ▁that ▁since ▁sw am ph ens ▁are ▁w ides p read ▁colon ists , ▁it ▁would ▁be ▁expected ▁that ▁populations ▁would ▁evol ve ▁similarly ▁to ▁the ▁tak ah ē ▁when ▁they ▁found ▁ref ug es ▁without ▁m amm als ▁( los ing ▁flight ▁and ▁becoming ▁bulk ier ▁with ▁st outer ▁legs , ▁for ▁example ); ▁this ▁was ▁the ▁case ▁with ▁the ▁Lord ▁How e ▁sw am phen . ▁Full er ▁suggested ▁that ▁they ▁could ▁be ▁called ▁" white ▁tak ah ē s ", ▁which ▁had ▁been ▁all ud ed ▁to ▁earlier ; ▁the ▁white ▁birds ▁may ▁have ▁been ▁a ▁colour ▁morph ▁of ▁the ▁population , ▁or ▁the ▁blue ▁birds ▁may ▁have ▁been ▁Austral as ian ▁sw am ph ens ▁which ▁associated ▁with ▁the ▁white ▁birds . ▁ ▁In ▁