Stelgidopteryx is a small genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of swallows. It contains three species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

:

• Northern Rough-winged Swallow
  Northern Rough-winged Swallow
  The Northern Rough-winged Swallow is a small swallow.Adults are 13–15 cm in length, brown on top with light underparts and a forked tail. They are similar in appearance to the Bank Swallow but have a dusky throat and breast...
  
  , Stelgidopteryx serripennis, a migratory
  Bird migration
  Bird migration is the regular seasonal journey undertaken by many species of birds. Bird movements include those made in response to changes in food availability, habitat or weather. Sometimes, journeys are not termed "true migration" because they are irregular or in only one direction...
  
   North America
  North America
  North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
  
   bird
  Bird
  Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
  
  .
• Southern Rough-winged Swallow
  Southern Rough-winged Swallow
  The Southern Rough-winged Swallow , Stelgidopteryx ruficollis, is a small swallow. It was first formally described as Hirundo ruficollis by French ornithologist Louis Vieillot in 1817 in his Nouveau Dictionnaire d'Histoire Naturelle....
  
  , Stelgidopteryx ruficollis, a partial migrant breeding in Central
  Central America
  Central America is the central geographic region of the Americas. It is the southernmost, isthmian portion of the North American continent, which connects with South America on the southeast. When considered part of the unified continental model, it is considered a subcontinent...
  
   and South America
  South America
  South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...
  
  .
• Ridgway's Rough-winged Swallow
  Ridgway's Rough-winged Swallow
  The Ridgway's Rough-winged Swallow is a species of bird in the Hirundinidae family.It is found in Belize, Guatemala, and Mexico.-References:* BirdLife International 2004. . Downloaded on 27 July 2007....
  
  , Stelgidopteryx ridgwayi

Adults of both species are brown on top with lighter underparts and a slightly forked tail. They nest in cavities but do not excavate their holes or form colonies

Bird colony

A bird colony is a large congregation of individuals of one or more species of bird that nest or roost in close proximity at a particular location. Many kinds of birds are known to congregate in groups of varying size; a congregation of nesting birds is called a breeding colony...

.

These birds forage in flight over water or fields, usually flying low. They eat insect

Insect

Insects are a class of living creatures within the arthropods that have a chitinous exoskeleton, a three-part body , three pairs of jointed legs, compound eyes, and two antennae...

s.

"Rough-winged" refers to the serrated edge feathers on the wing of this genus; this feature would only be apparent in the hand.