The Pyrocephalus rubinus, commonly known as the Vermilion Flycatcher, is native to the Americas, with its geographical distribution extending from the southwestern United States through Central America and into much of South America. The species can be found in countries such as the United States (particularly in the states of Arizona, Texas, and California), Mexico, Costa Rica, Colombia, Ecuador, Peru, Argentina, and others.

The Vermilion Flycatcher typically inhabits open and semi-open areas, often near water bodies. It favors environments such as savannas, shrublands, grasslands, and agricultural areas that have scattered trees or bushes. It is also found in arid and desert regions where it can perch visibly to hunt for insects.

This species primarily feeds on insects and is often seen sallying from perches to catch flying insects midair. The Vermilion Flycatcher plays an important role in controlling insect populations, acting as a significant factor in maintaining ecological balance within its environment. Its bright plumage, particularly in males, also plays a role in territorial and mating displays.