3 0 0 ▁species ▁of ▁but ter f lies . ▁Ele ven ▁different ▁bi ological ▁communities ▁exist ▁on ▁the ▁National ▁Wild life ▁Ref uge , ▁from ▁the ▁Ch ih u ah uan ▁Des ert ▁th orn ▁forest ▁to ▁tid al ▁wet lands . ▁ ▁Wild life ▁include ▁the ▁rare ▁o cel ot , ▁northern ▁car ac ara , ▁Mexican ▁blue wing ▁but ter fly ▁( M ys cel ia ▁eth usa ), ▁great ▁k iska de e , ▁red - bil led ▁p ige on , ▁Alt am ira ▁or io le , ▁ring ed ▁king fish er ▁and ▁green ▁j ay . ▁ ▁The ▁refuge ▁is ▁designated ▁as ▁part ▁of ▁the ▁Great ▁Texas ▁Coast al ▁Bird ing ▁Tra il , ▁a ▁network ▁of ▁wild life ▁view ing ▁sites ▁throughout ▁the ▁Texas ▁coast al ▁regions . ▁ ▁See ▁also ▁ ▁References ▁ ▁External ▁links ▁South west . f ws . gov : ▁Official ▁Lower ▁Rio ▁Grande ▁Valley ▁National ▁Wild life ▁Ref uge ▁website ▁ ▁Category : National ▁Wild life ▁Ref ug es ▁in ▁Texas ▁Category : R io ▁Grande ▁Valley ▁Category : W et lands ▁of ▁Texas ▁Category : Pro te cted ▁areas ▁of ▁Z ap ata ▁County , ▁Texas ▁Category : Pro te cted ▁areas ▁of ▁St arr ▁County , ▁Texas ▁Category : Pro te cted ▁areas ▁of ▁H idal go ▁County , ▁Texas ▁Category : Pro te cted ▁areas ▁of ▁Camer on ▁County , ▁Texas ▁Category : Land forms ▁of ▁Z ap ata ▁County , ▁Texas ▁Category : Land forms ▁of