Shadowbird

Shadowbird (影鳥, Kagetori) is a bird animal whose body is situated around the center section of Tropical Fields, southwest of the entrance to Dr. Hager's Lab.

Characteristics
The Shadowbird is an avian who's body and feathers are mainly red. It has a pencil-thin neck which makes the bird taller and feathers that extend from the top of it's head and out it's rear. It's eyes, beak and feet are yellow. In Kurashima's illustration, the head and tail feathers are rather long and multicolored.

Hint
Interestingly, there's a feather trail southeast of this bird's shadow. The bird itself may be looking for it's next prey.