Wedge-tailed Sabrewing is widely distributed and is fairly common across its range. Nonetheless, most aspects of its natural history are very poorly known. There is essentially no information on its diet, and only very cursory descriptions of the nest and eggs. There is no information on such topics as territoriality, age at first breeding, life span and survivorship, dispersal, population regulation, and population density. Also unresolved are the taxonomic relationships between the two taxa, curvipennis and pampa, that currently are recognized as two subspecies in a single species, and between these two and Long-tailed Sabrewing (Campylopterus excellens).