Murderface

Murderface, a Golden Eagle, is a ruthless, imprudent and murderous raptor that kills for the fun of it. He is large for his sex, with large wings, large beak and talons covered in thorns from various plants. He has an odd stare, with a strange right eye, being red. His bill is unkempt, covered in blood. A large scar covers from his right eye all the way to his breast.

He is the one that killed Silvereye's parents, Swallowheart and Whitepatch.

It is unknown as to why he turned murderous and what his previous name is.

In Spottail's Death
He is briefly shown. Spottail mistook him for his mate, Spotbelly, but once he learned his mistake, he then realises that it wasn't his mate. Murderface mentions that he saw another redshoulder, and Spottail looks down to see his mate lying dead on the ground. Spottail is shocked and immediately flies down to her, and Murderface snaps his neck with a single blow.

However, Spotbelly makes it through the attack. Blacktail hates Murderface, and wishes to rip his smug murderous look off his face.

Based on...
He is the Fleeters equivalent to Tigerstar or Brokenstar, as well as Scourge.