Bombardier-beetle
Guides
Brachinus
bombardier beetles
Brachinus is a genus of ground beetles commonly known as bombardier beetles, native to the Nearctic, Palearctic, Near East, and North Africa. The genus is renowned for its explosive defensive chemistry, wherein beetles discharge a hot, noxious spray from the abdomen when disturbed. Species within Brachinus exhibit diverse ecological strategies: wetland-associated species are pupal ectoparasitoids of water beetles (Dytiscidae, Gyrinidae, Hydrophilidae), while dryland species such as B. explodens and B. crepitans parasitize ground beetle pupae of the genus Amara (Carabidae). The genus has been extensively studied for its chemical ecology, parasitoid life history, and habitat associations across agricultural and natural landscapes.
Brachinus aabaaba
Brachinus aabaaba is a species of bombardier beetle in the family Carabidae, first described by Terry Erwin in 1970. It belongs to the genus Brachinus, which is renowned for its chemical defense mechanism that produces a hot, noxious spray from the abdomen when disturbed. The species name 'aabaaba' is unusual and appears to be a non-standard formation, possibly reflecting a descriptive or arbitrary designation by the author. Records indicate this species occurs in Mexico and the southwestern United States.
Brachinus adustipennis
Brachinus adustipennis is a species of bombardier beetle in the family Carabidae, first described by Terry Erwin in 1969. It belongs to the genus Brachinus, which is renowned for its remarkable chemical defense mechanism—producing a hot, noxious spray from the abdomen when disturbed. The species occurs across a broad geographic range spanning the Caribbean, Central America, and North America, with confirmed records from Cuba, Mexico, Panama, and the United States.
Brachinus alexiguus
Brachinus alexiguus is a species of bombardier beetle in the family Carabidae, described by Erwin in 1970. As a member of the genus Brachinus, it possesses the characteristic defensive chemical spray mechanism for which these beetles are renowned. The species is known from North America, with confirmed records from the United States.
Brachinus alternans
Brachinus alternans is a species of bombardier beetle in the family Carabidae, characterized by its chemical defense mechanism. The species occurs in Central America and North America, including the United States. Like other members of the genus Brachinus, it possesses the ability to discharge a hot, noxious chemical spray from the abdomen as a defense against predators. The specific epithet 'alternans' refers to some alternating pattern in the original description, though the precise nature of this pattern is not detailed in available sources.
Brachinus americanus
Brachinus americanus is a species of ground beetle in the family Carabidae, first described by LeConte in 1844. It belongs to the genus Brachinus, commonly known as bombardier beetles, which are notable for their chemical defense mechanism. The species is distributed across North America, with records from both the United States and Canada. Like other members of its genus, it likely possesses the characteristic defensive glands that produce hot, noxious chemicals when threatened.
Brachinus cibolensis
Brachinus cibolensis is a species of ground beetle in the family Carabidae, first described by Erwin in 1970. It belongs to the genus Brachinus, commonly known as bombardier beetles, which are renowned for their unique chemical defense mechanism. The species is distributed across Central America and North America, including Mexico and the United States. Like other members of its genus, it is presumed to possess the characteristic ability to discharge hot, noxious chemicals from the abdomen as a defense against predators, though specific behavioral observations for this species have not been documented.
Brachinus costipennis
Brachinus costipennis is a species of bombardier beetle in the ground beetle family Carabidae, first described by Motschulsky in 1859. As a member of the genus Brachinus, it possesses the characteristic chemical defense system that defines this group: the ability to spray a hot, noxious mixture of benzoquinones from the abdomen when threatened. The species occurs in Central America and North America, with records from Guatemala, Mexico, and the United States.
Brachinus cyanipennis
Cyan-winged Bombardier Beetle
Brachinus cyanipennis is a bombardier beetle species in the family Carabidae, characterized by explosive defensive chemistry typical of the genus. Based on molecular phylogenetic analysis using COI, CAD, and 28S gene regions, this species was moved from Erwin's fumans species group to the newly erected cyanipennis species group within the subgenus Neobrachinus. The species is found in North America.
Brachinus cyanochroaticus
bombardier beetle
Brachinus cyanochroaticus is a species of bombardier beetle in the ground beetle family Carabidae. It is native to North America, with confirmed records from the United States and Canada. Like other members of the genus Brachinus, it possesses the distinctive defensive chemical reaction that gives bombardier beetles their common name. The species was described by Terry Erwin in 1969.
Brachinus elongatulus
elongated bombardier beetle
Brachinus elongatulus is a species of bombardier beetle in the ground beetle family Carabidae. It is found in Central America and North America, with records from Mexico and the United States. As a member of the genus Brachinus, it possesses the characteristic defensive chemistry that gives bombardier beetles their common name. The species was described by Chaudoir in 1876.
Brachinus favicollis
Brachinus favicollis is a species of bombardier beetle in the family Carabidae, described by Terry Erwin in 1965. Like other members of the genus Brachinus, this species possesses the remarkable defensive ability to eject a hot, noxious chemical spray from the tip of its abdomen when disturbed. The species occurs in the southwestern United States and Mexico.
Brachinus fulminatus
Brachinus fulminatus is a species of ground beetle in the family Carabidae, described by Erwin in 1969. The species is known from North America, with distribution records from the United States. Like other members of the genus Brachinus, it is expected to possess chemical defense capabilities, though specific details for this species remain undocumented.
Brachinus fumans
American bombardier beetle
Brachinus fumans, commonly known as the American bombardier beetle, is a ground beetle in the family Carabidae and subfamily Brachininae. This species belongs to the subgenus Neobrachinus and was originally placed in Erwin's fumans species group based on morphological characters, though molecular phylogenetic studies have redefined this group. The species is endemic to the Nearctic region and is found across North America. Like other bombardier beetles, it possesses remarkable explosive defensive chemistry.
Brachinus hirsutus
Brachinus hirsutus is a species of bombardier beetle in the family Carabidae, characterized by its ability to produce defensive chemical sprays. It is found in Central America and North America, with records from Mexico and the United States. Like other members of the genus Brachinus, it possesses specialized defensive glands that can discharge hot, noxious chemicals when threatened.
Brachinus imporcitis
Brachinus imporcitis is a species of ground beetle in the family Carabidae, described by Terry Erwin in 1970. It belongs to the genus Brachinus, commonly known as bombardier beetles, which are renowned for their chemical defense mechanism. The species is known to occur in North America, specifically within the United States. Like other members of Brachinus, it likely possesses the characteristic ability to discharge a hot, noxious chemical spray when threatened, though specific behavioral observations for this species have not been documented.
Brachinus janthinipennis
Brachinus janthinipennis is a species of bombardier beetle in the family Carabidae, native to North America. Like other members of the genus Brachinus, it possesses the remarkable defensive ability to discharge a hot, noxious chemical spray from its abdomen when threatened. The species occurs in Canada and the United States, though specific details about its biology and ecology remain poorly documented in the scientific literature.
Brachinus medius
Medial Bombardier Beetle
Brachinus medius is a species of bombardier beetle in the family Carabidae. It is one of approximately 40 species in the genus Brachinus found in North America. Like other members of its genus, it possesses the remarkable defensive ability to discharge a hot, noxious chemical spray from the tip of its abdomen when threatened. The species occurs across much of North America including the United States, Canada, and Mexico.
Brachinus pallidus
Brachinus pallidus is a bombardier beetle in the family Carabidae, first described by Erwin in 1965. Like other members of the genus Brachinus, it possesses the remarkable chemical defense system for which bombardier beetles are famous: paired glands that combine hydroquinones and hydrogen peroxide to produce a hot, noxious spray of benzoquinones when threatened. The species is known from California and represents part of the diverse North American fauna of this chemically defended ground beetle genus.
Brachinus patruelis
Brachinus patruelis is a small ground beetle in the bombardier beetle subfamily Brachininae. The species is endemic to the northeastern United States, with records from Massachusetts. Adults measure 5.7–8.3 mm in body length. Like other members of the genus, it possesses the defensive chemical secretion capability characteristic of bombardier beetles, though specific details of this behavior in B. patruelis have not been separately documented.
Brachinus phaeocerus
Brachinus phaeocerus is a species of ground beetle in the family Carabidae, first described by Chaudoir in 1868. It belongs to the bombardier beetle genus Brachinus, notable for its chemical defense mechanism. The species occurs in Central America and North America, including Mexico and the United States. Like other members of its genus, it possesses the characteristic ability to produce and eject defensive chemicals when threatened.
Brachinus puberulus
Brachinus puberulus is a species of bombardier beetle in the family Carabidae, described by Chaudoir in 1868. It belongs to the genus Brachinus, renowned for its chemical defense mechanism that produces a hot, noxious spray from the abdomen when disturbed. The species is recorded from the United States and Middle America, though specific details about its biology and ecology remain sparse in the available literature.
Brachinus quadripennis
Square-winged Bombardier Beetle
Brachinus quadripennis is a species of ground beetle in the family Carabidae, commonly known as the Square-winged Bombardier Beetle. It belongs to the bombardier beetle genus Brachinus, which is renowned for its chemical defense mechanism. The species is found in Central America and North America, with records from Canada, the United States, and Middle America.
Brachinus rugipennis
Brachinus rugipennis is a species of ground beetle in the family Carabidae. It was described by Chaudoir in 1868 and is known from North America, with records from the United States. Like other members of the genus Brachinus, it belongs to the bombardier beetle group, which are characterized by their remarkable chemical defense mechanism.
Brachinus tenuicollis
Narrow-necked Little Bombardier Beetle
Brachinus tenuicollis is a Nearctic bombardier beetle in the subgenus Neobrachinus, characterized by explosive defensive chemistry producing hot benzoquinone clouds. Molecular phylogenetic analysis placed this species in the newly erected tenuicollis species group, separated from Erwin's historically polyphyletic fumans group. The species shares with other Neobrachinus members a parasitoid larval strategy targeting aquatic beetle pupae and tendency toward multispecies aggregations.
Brachinus texanus
Brachinus texanus is a species of bombardier beetle in the family Carabidae. Like other members of its genus, it possesses a remarkable defensive chemical mechanism, spraying a hot, corrosive liquid from its abdomen when disturbed. The species occurs in North America, with records from the United States and Canada.
Brachinus vulcanoides
Brachinus vulcanoides is a species of bombardier beetle in the ground beetle family Carabidae, first described by Erwin in 1969. As a member of the genus Brachinus, it possesses the characteristic defensive chemical spray mechanism that defines this group. The species is known from North America, specifically recorded from the United States, though detailed natural history information remains limited in the available literature.
Metrius contractus
Contracted Bombing Beetle
Metrius contractus is a bombardier beetle in the family Carabidae, described by Johann Friedrich von Eschscholtz in 1829. It belongs to the subfamily Paussinae and is one of approximately 295 documented observations. The species is distributed in North America, specifically in Canada and the United States. It is known for its defensive chemical capabilities characteristic of bombardier beetles.
Metrius contractus contractus
Contracted Bombing Beetle
Metrius contractus contractus is a subspecies of ground beetle in the family Carabidae, native to western North America. It belongs to the tribe Metriini, which is notable for its specialized chemical defense mechanisms. The species has been documented in Canada and the United States, with observations concentrated in western regions. Like other members of its genus, it possesses the ability to discharge defensive chemicals, earning it the common name 'Contracted Bombing Beetle.'