Geruta

Gerutas can survive in the extreme heats of Norfair and have a fierce aerial dive attack. They attack in a similar manner as Reos.

Their thick armour plated wings make them vicious predators, and they are near the top of the food chain on Zebes.

Gerutas also appear as X-hosts in sectors 1 and 5 on board the BSL Station after the destruction of Zebes in Metroid Fusion. Interestingly, they are most common in Sector 5, which is a sub-zero area, and do not appear at all in Sector 3, the super-heated area that is akin to their native habitat in Norfair. They also appear to have metallic pincer arms that are larger than their typical arm size.

Metroid manual
"The skin on these powerful opponents can generate fire and radiate the energy inside their bodies. Be especially careful of the strong red ones. These creatures are the most powerful to appear in this scene."

1986 manga
"A Geruta's skin emits high temperatures, and it releases the energy stored inside its body to fly around. It has the same toughness as the Rio, and pink ones are weaker than the red ones."

Official Nintendo Player's Guide
"Its body is covered with skin which radiates intense heat. It attacks Samus from overhead."

Super Metroid manual
"This enemy defends itself by a heat-resistant shell and attacks ceaselessly with two large claws."

Super Metroid Nintendo Player's Guide
"Gerutas fly about in a circular/diagonal manner."