Premise: Last month, native bird trappers have snared and caught the Luzon Buttonquail (Turnix worcesteri or Worcester's buttonquail) in Dalton Pass, a cold and wind-swept bird passageway in the Caraballo Mountains, in Nueva Vizcaya, located between Cordillera Central and Sierra Madre mountain ranges, in Northern Luzon. The rare species, previously known to birders only through drawings based on dead museum specimens collected several decades ago, was identified in a documentary filmed in the Philippines called Bye-Bye Birdie."
Hypothesis: Turnix worcesteri have black eyes.