Red wolves are an ecological species and self-sustaining, but it originates from coyote x grey wolf hybridation (which is throughly extended, as coyotes and grey wolves are sister species to begin with, and admixture is so prevalent as to make EVERY coyote in the planet to have grey wolf ancestry, and every North American grey wolf to have coyote ancestry). Hybridation is THROUGHLY widespread in nature and is an important driving force of evolution, yet it clashes with pedigree-based mentality, which is a cultural human construct, often used to keep families in power.
However, hybrid ancestry is used as a red flag in conservation, "it isn't a rare species, it is a mutt". Which is a dangerous misunderstanding of ecology. It is not all about tidy neat separate boxes, it is all gradual diversity that may or may not be interrupted.
The Mayr concept of species is throughly outdated. Specially on plants, oh my god plants are insane and solve an uneven chromosomic count by duplicating their entire genome so meiosis may proceed.