Conifer-specialist
Guides
Acantholyda
web-spinning sawflies, pine sawflies
Acantholyda is a genus of web-spinning sawflies in the family Pamphiliidae, distributed across Europe, Asia, and North America. Species are associated with coniferous hosts, particularly Pinus and Cedrus. Several species are significant forest pests capable of causing extensive defoliation during outbreaks. Larvae construct silken webs and may enter extended diapause in soil.
Acleris variana
Eastern Black-headed Budworm, Black-headed Budworm
Acleris variana is a tortricid moth endemic to North American coniferous forests, ranging from Cape Breton Island to Alaska. The species is a recurrent epidemic defoliator of coniferous trees, with periodic population outbreaks causing significant forest damage. Larvae feed on multiple conifer genera with regionally variable host preferences. Population trends are strongly influenced by weather conditions, particularly cold, wet periods that increase larval mortality.
Acmaeops discoideus
Acmaeops discoideus is a flower longhorn beetle (subfamily Lepturinae) distributed across the United States and Canada. The species feeds on Virginia pine (Pinus virginiana) as a larva, boring in the wood of this conifer host. Adults are active during autumn and have been observed into December in some regions. The species was formerly spelled A. discoidea, but A. discoideus is now the accepted name.
Aphidecta
larch ladybird, larch ladybug
Aphidecta is a genus of Coccinellidae (ladybird beetles) containing at least one well-documented species, A. obliterata, commonly known as the larch ladybird. Members are specialized predators of conifer-infesting adelgids and aphids. The genus has been the subject of biological control research, particularly for management of balsam woolly aphid.
Argyresthia canadensis
Canadian arborvitae leafminer, cedar leafminer
Argyresthia canadensis is a small moth in the family Argyresthiidae, commonly known as the Canadian arborvitae leafminer or cedar leafminer. The species is found in North America and has a single generation per year. Larvae are specialized leafminers of Thuja occidentalis (northern white-cedar), feeding between the layers of needle tissue.
Argyresthia franciscella
Argyresthia franciscella is a small moth in the family Argyresthiidae, described by Busck in 1915. It is native to western North America, with records from California. The species has a single generation annually. Larvae are specialized miners of cypress foliage, feeding within the growing tips of Cupressus species.
Argyrotaenia cupressae
Argyrotaenia cupressae is a small tortricid moth endemic to California. Adults fly from May through September and have a wingspan of approximately 18–19 mm. The species is notable for its specialized larval diet on cypresses, junipers, and coast redwood.
Atimia confusa
Small Cedar Borer, Small Cedar-bark Borer
Atimia confusa is a species of long-horned beetle in the family Cerambycidae. It is native to North America and has been documented in both Canada and the United States. The species was first described by Thomas Say in 1827. It belongs to the small tribe Atimiini within the diverse cerambycid family.
Batrachedra pinicolella
Pine Cosmet
A small conifer-feeding moth in the family Batrachedridae. Formerly cryptic within a species complex, integrative taxonomic studies using DNA barcoding, nuclear markers, and ddRAD sequencing distinguished it from the newly described B. confusella. It has a boreo-montane distribution pattern and is associated primarily with Norway spruce.
Buprestis prospera
Buprestis prospera is a species of metallic wood-boring beetle in the family Buprestidae. It is native to North America and has been documented in pinyon-juniper woodland habitats. Adults have been found associated with dead and dying Pinus edulis (Colorado pinyon pine), suggesting a larval host relationship with this conifer species. The species was described by Casey in 1909.
Callophrys gryneus
juniper hairstreak, olive hairstreak
A small North American lycaenid butterfly with bright green undersides and highly variable wing patterns across its range. The species exhibits substantial geographic variation, with multiple named subspecies differing in coloration, pattern elements, and host plant associations. Males are territorial on host trees, and the species overwinters as a chrysalis. Taxonomic controversy persists regarding whether some subspecies merit full species status.
Callophrys gryneus muiri
Muir's Hairstreak, Muir Juniper Hairstreak
A western North American subspecies of Juniper Hairstreak, historically treated as a distinct species (Callophrys muiri) based on phenotypic differences and geographic isolation. DNA barcoding studies indicate it is genetically divergent from other C. gryneus populations, though its taxonomic status remains debated. Associated with coniferous habitats in California.
Coleotechnites apicitripunctella
Green Hemlock Needleminer, Hemlock Leaf Miner, Baldcypress Webworm
A small gelechiid moth whose larvae mine needles of eastern hemlock and bald cypress. The species has one generation annually and occurs in eastern North America. Larvae are distinctive with yellowish-green bodies, orange-brown heads, and dark green spots.
Coleotechnites macleodi
brown hemlock needleminer
A small gelechiid moth known for its specialized relationship with eastern hemlock. The common name refers to its larval habit of mining within hemlock needles. It completes one generation annually in its northern range.
Contarinia
An undescribed species of gall midge in the genus Contarinia that induces galls on incense cedar (Calocedrus decurrens). As an undescribed species, it lacks formal scientific description and species epithet. It belongs to a large genus of cecidomyiid flies, many of which are specialized gall-formers on conifers and other plants.
Cydia cupressana
Cypress bark moth
Cydia cupressana is a small tortricid moth first described by Kearfott in 1907. The species is commonly known as the cypress bark moth, reflecting its association with cypress host plants. It belongs to the genus Cydia, which includes several economically significant agricultural pests, though C. cupressana itself is not among the most extensively studied species in the genus. The moth is part of the diverse Tortricidae family, which contains approximately 10,000 described species worldwide.
Cydia ingens
Longleaf Pine Seedworm Moth
A small tortricid moth native to the southeastern United States, specialized on pine seeds. Adults are grayish-brown with distinctive metallic bars on the forewings. The species is of minor economic concern due to seed damage in pine plantations.
Cydia piperana
Ponderosa Pine Seedworm Moth
Cydia piperana, commonly known as the ponderosa pine seedworm moth, is a small tortricid moth native to southwestern North America. The species is specialized on conifer hosts, with larvae developing within the seeds of Pinus ponderosa and Pinus jeffreyi. Adults are modest in size with a wingspan of approximately 19 mm. The moth is of ecological interest as a seed predator in pine ecosystems and has potential relevance to forest health monitoring, though it is not considered a major economic pest.
Diprionidae
Conifer Sawflies
Diprionidae is a family of conifer-feeding sawflies comprising approximately 90-140 species across 11-13 genera. Larvae feed gregariously on conifer needles and can cause major forest outbreaks. Adults are stingless wasps with distinctive antennae: males possess pectinate (comb-like) antennae while females have serrate (saw-like) antennae with about 20 flagellomeres. The family is restricted to the Northern Hemisphere and includes significant forest pests such as Neodiprion sertifer and N. abietis.
Eacles imperialis pini
Imperial moth (pini subspecies), pine-feeding Imperial moth
Eacles imperialis pini is a subspecies of the Imperial moth, a giant silk moth in the family Saturniidae. This subspecies is notable for its association with pine and other coniferous trees as larval hosts, distinguishing it from nominate populations that feed primarily on deciduous trees. Adults are large, visually striking moths with yellow and purple-brown patterning. The subspecies occurs in North America, with documented populations on Martha's Vineyard, Massachusetts, where it has persisted while other Imperial moth populations in New England have declined or been extirpated.
Elatophilus
minute pirate bugs
Elatophilus is a genus of minute pirate bugs (family Anthocoridae) comprising approximately 15 described species. Species in this genus are specialist predators associated with coniferous trees, particularly pine. Several species have been studied as biological control agents of scale insects that damage commercially important pine stands. The genus shows strong host-specificity, with life cycles tightly coupled to their prey and host tree phenology.
Eucopina monitorana
Red Pine Coneborer Moth
Eucopina monitorana, commonly known as the Red Pine Coneborer Moth, is a species of tortricid moth first described by Heinrich in 1920. It belongs to the subfamily Olethreutinae and tribe Eucosmini. The species is associated with coniferous hosts, particularly pines, where larvae develop within cones. It has been documented across a limited number of observations, suggesting a more restricted or specialized distribution.
Eucopina rescissoriana
Lodgepole Pine Coneborer Moth
A small tortricid moth whose larvae bore into the cones of lodgepole pine (Pinus contorta). The common name reflects this specialized association. Adults are rarely observed directly; records primarily derive from larval collections and cone dissections. The species appears restricted to regions where its host pine occurs.
Eufidonia convergaria
Pine Powder Moth, Converged Powder Moth
Eufidonia convergaria is a North American geometrid moth commonly known as the pine powder moth. The species is strongly associated with Pinus forests across northern and western regions of the continent. Adults are active in late spring and early summer, with larvae specialized on pine foliage.
Eupithecia mutata
spruce cone looper, cloaked pug
Eupithecia mutata is a small moth in the family Geometridae, first described by Pearsall in 1908. The species is restricted to northeastern North America, where it occurs in coniferous forest habitats. The common name "spruce cone looper" reflects its larval association with spruce cones.
Exoteleia
Exoteleia is a genus of small moths in the family Gelechiidae, established by Wallengren in 1881. Species in this genus are associated with coniferous hosts, particularly pines (Pinus), where larvae function as needle miners and bud feeders. Several species are recognized as economic pests of plantation, ornamental, and Christmas tree pines in North America and Europe. The genus includes at least nine described species distributed across the Holarctic region.
Hylobius warreni
Warren's rootcollar weevil, Warren rootcollar weevil
Hylobius warreni is a flightless weevil native to boreal forests of Canada, where it is a significant pest of coniferous trees. Adults feed on bark of spruce, pine, and other conifers before oviposition, while larvae tunnel in the root collar region, often girdling and killing young trees. The species has emerged as a particular concern in areas affected by mountain pine beetle outbreaks due to increased reforestation efforts. Population levels are influenced by stand density, tree age, and depth of duff material around tree bases.
Hylotrupes
House Longhorns, House Longhorn Beetle, Old House Borer, European House Borer, Italian Beetle
Hylotrupes is a monotypic genus of woodboring beetles in the family Cerambycidae, containing only the species Hylotrupes bajulus. The genus is the sole member of the tribe Hylotrupini. The species has been introduced globally through timber trade and is recognized as a significant pest of structural softwood timber. Adults are active in summer months, while larvae develop slowly within wood.
Hylotrupes bajulus
House Longhorn Beetle, Old House Borer, European House Borer
Hylotrupes bajulus is a woodboring beetle and the sole species in its genus. Native to Europe, it has spread globally through timber trade to become practically cosmopolitan. It is a significant pest of structural timber, particularly dry coniferous sapwood. Sexually mature females produce a species-specific sex pheromone that attracts males from short distances.
Lithophane atara
Lithophane atara is a noctuid moth described by Smith in 1909. The species has a forewing length of approximately 18–20 mm. Adults are active in late summer, with flight records from August to September. Larvae are specialized feeders on Pinus species, specifically lodgepole pine and ponderosa pine. The species is restricted to western Canada.
Lithophane lemmeri
Lemmer's Pinion, Lemmer's noctuid moth
Lithophane lemmeri is a noctuid moth native to eastern North America, first described in 1929. It is listed as a species of special concern in Connecticut, reflecting its limited distribution and potential vulnerability. The species is associated with coniferous host plants and has a relatively narrow flight period in early summer.
Macaria fissinotata
Hemlock Angle
Macaria fissinotata, commonly known as the hemlock angle, is a small geometrid moth native to eastern North America. Adults are active from late spring through summer, with flight periods varying by latitude. The species is strongly associated with coniferous forests, where its larvae feed on hemlock, spruce, and fir trees. The specific epithet refers to the often-split forewing spot that serves as a key identification feature.
Melanophila
fire beetles
Melanophila is a genus of buprestid beetles known as fire beetles, distinguished by extraordinary sensitivity to infrared radiation. They possess specialized heat-sensing organs located near their legs that detect infrared radiation from forest fires. This sensory adaptation drives their behavior of seeking out fires to mate and oviposit in freshly burned wood. The genus contains approximately 16 described species distributed across North America and Eurasia.
Melanophila occidentalis
Melanophila occidentalis is a metallic wood-boring beetle in the family Buprestidae, described by Obenberger in 1928. The genus Melanophila is notable for its pyrophilic behavior, with some species attracted to smoke and heat from forest fires. This species occurs in North America, including British Columbia, Canada. Like other members of the genus, it likely develops in fire-scarred or recently burned coniferous wood.
Monochamus maculosus
spotted pine sawyer
Monochamus maculosus, the spotted pine sawyer, is a longhorned beetle native to North America. It was formerly known as Monochamus mutator. Adults are attracted to monochamol, a sex-aggregation pheromone produced by males. The species breeds in stressed or recently dead conifers, with larvae tunneling in phloem and sapwood. It is a primary vector of the pinewood nematode, the causal agent of pine wilt disease.
Monochamus scutellatus
white-spotted sawyer, spruce sawyer, spruce bug, hair-eater
Monochamus scutellatus is a large cerambycid beetle native to North America, commonly known as the white-spotted sawyer. Adults are notable for extreme sexual dimorphism in antennae length, with male antennae reaching up to twice body length. The species colonizes stressed, dying, or recently dead conifers, showing strong preference for burned forest habitats. Larvae develop as wood-borers, creating galleries in phloem, cambium, and sapwood. Adults emerge mid-June to mid-August and feed on conifer bark and foliage before mating.
Mulsantina picta
Painted Lady Beetle, Pine Lady Beetle
Mulsantina picta is a small lady beetle native to North America, commonly found in pine forest habitats across the United States and southern Canada. The species is a specialized predator of aphids and adelgids associated with conifers. Adults measure 3.3–5.3 mm in length and exhibit variable elytral patterning. The species has been observed to dominate in older pine stands despite low aphid densities in these habitats.
Neophasia terlooii
Chiricahua White, Chiricahua Pine White, Mexican Pine White
Neophasia terlooii is a butterfly in the family Pieridae endemic to the sky islands of southeastern Arizona and Mexico. Males are white with black markings while females are orange with black wing veins, exhibiting pronounced sexual dimorphism. The species has two generations annually, with a small summer brood and larger fall population. Larvae feed on conifers, specifically Ponderosa Pine and Engelmann Spruce, and eggs are laid exposed on pine needles where they overwinter in a desiccation-resistant quiescent state.
Orgyia pseudotsugata
Douglas-fir tussock moth
A western North American tussock moth known for periodic population outbreaks that cause significant defoliation of conifer forests. Males are winged and grayish-brown with feathery antennae, while females are flightless with rudimentary wings. Caterpillars are distinctive with red spots, white spines, and prominent red-tipped white tussocks. The species undergoes cyclical outbreaks every 8-12 years that can persist for up to four years.
Phymatodes nitidus
sequoia cone borer
Phymatodes nitidus is a longhorn beetle (family Cerambycidae) native to western North America. The species is notable for its specialized reproductive association with conifers, specifically laying eggs on giant sequoia and coast redwood cones. Larvae burrow into these cones to develop. The species was described by LeConte in 1874. Phymatodes mojavensis was synonymized under P. nitidus in 2010.
Pineus similis
Ragged Spruce Gall Adelgid
Pineus similis is a gall-forming adelgid that induces galls on spruce trees (Picea spp.). Originally described as Chermes similis by Gillette in 1907 from blue spruce in Colorado, it was later transferred to genus Pineus by Annand. The species produces winged females that emerge from galls and settle on spruce hosts, with documented preference for white spruce. Wingless females bearing egg clusters occur within galls. It has been recorded on multiple spruce species across North America and has doubtful or rare records in Europe.
Pissodes nemorensis
Deodar weevil, Eastern pine weevil
Pissodes nemorensis is a univoltine true weevil in the family Curculionidae, commonly known as the deodar weevil or eastern pine weevil. It is a significant forest pest in North America, particularly in the southeastern United States, where adults and larvae feed on phloem of coniferous trees. The species acts as a vector for pitch canker fungus (Fusarium moniliforme var. subglutinans) and is associated with blue stain fungi including Leptographium procerum and Ophiostoma piceae. Seasonal activity varies geographically: southern populations are primarily active in autumn and winter, while northern populations are active in spring.
Polygraphus
four-eyed fir bark beetles, polygraphus bark beetles
Polygraphus is a genus of bark beetles (Coleoptera: Curculionidae: Scolytinae) in the tribe Polygraphini. Species in this genus are phloephagous, feeding on the inner bark of coniferous trees, particularly fir (Abies) and spruce (Picea). The genus includes both native and invasive species, with Polygraphus proximus being the most economically significant due to its invasive spread across Russia and mass mortality impacts on fir forests. Members exhibit monogynous mating systems and produce species-specific stridulatory signals.
Pseudohemihyalea ambigua
red-banded aemilia
Pseudohemihyalea ambigua, commonly known as the red-banded aemilia, is a moth species in the family Erebidae (subfamily Arctiinae). It occurs from southern Wyoming southward through the Rocky Mountain and southwestern United States to Durango, Mexico. Adults are active from June to August, with forewing lengths of approximately 22 mm in males and 24 mm in females. The larvae feed on Pinus ponderosa (ponderosa pine).
Retinia edemoidana
Retinia edemoidana is a small moth in the family Tortricidae, first described by Harrison G. Dyar in 1903. It belongs to the pine cone moth genus Retinia, whose larvae develop within conifer cones. The species is documented from western North America, where it associates with pine hosts.
Semanotus litigiosus
Firtree Borer
Semanotus litigiosus is a longhorn beetle (Cerambycidae) known as the firtree borer, found in the coniferous forest belt of North America. The species is a wood-boring pest of white fir (Abies concolor), with larvae causing significant damage to windthrown timber by excavating galleries in the phloem and boring deep into the sapwood to construct pupal chambers. Adults emerge in spring and lay eggs in bark crevices, with a life cycle spanning approximately one year.
Serropalpus substriatus
Striated False Darkling Beetle
Serropalpus substriatus is a species of false darkling beetle in the family Melandryidae. The species is known from coniferous forest habitats, with documented larval development in giant sequoia (Sequoiadendron giganteum). It occurs across much of Canada, with records from Alberta, British Columbia, Manitoba, New Brunswick, and Labrador. The species is rarely encountered, with limited biological data available.
Syneta extorris
Syneta extorris is a leaf beetle species in the family Chrysomelidae, described by Brown in 1940. The species is endemic to eastern North America and comprises two recognized subspecies with distinct geographic distributions and host associations. The nominate subspecies occurs in the southern Appalachian Mountains, while S. e. borealis ranges from Newfoundland to Ontario and New York.
Syngrapha abstrusa
Abstruse False Looper Moth, abstruse false looper
Syngrapha abstrusa is a noctuid moth described in 1978 from North American specimens. Adults are medium-sized with wingspans of 30–32 mm. Larvae are specialized feeders on conifer foliage, particularly spruce and pine species. The species exhibits a transcontinental northern distribution pattern.
Tetropium parvulum
Northern Spruce Borer
Tetropium parvulum, the northern spruce borer, is a small cerambycid beetle specialized on spruce hosts. It was elevated from synonymy with T. cinnamopterum based on distinct morphological differences in larvae and adults, and exhibits strict host specificity to Picea compared to the conifer generalist T. cinnamopterum. The species has a one-year life cycle and is an economically important borer of white and Engelmann spruce logs in western Canada.
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n-managementreform-managementreorganization-managementrestructuring-managementreengineering-managementredesign-managementreplanning-managementreinvestment-managementreallocation-managementredistribution-managementreconfiguration-managementrealignment-managementreorientation-managementrepositioning-managementrebranding-managementremarketing-managementrelaunch-managementreintroduction-managementreestablishment-managementreinstatement-managementreintegration-managementreconciliation-managementreunification-managementrebuilding-managementrebirth-managementresurrection-managementreincarnation-managementreemergence-managementreappearance-managementreturn-managementcomeback-managementrebound-managementresurgence-managementrevival-managementreawakening-managementrekindling-managementreignition-managementrelighting-managementreillumination-managementrebrightening-managementTreptoplatypus
Treptoplatypus is a genus of ambrosia beetles (pinhole borers) in the family Curculionidae, subfamily Platypodinae. The genus comprises more than 20 described species, including the rare European species T. oxyurus, which forms obligate nutritional symbioses with ambrosia fungi cultivated within wood galleries. Members of this genus are wood-boring insects that colonize dead or dying trees, with some species showing specialized host associations.
Trichocnemis spiculatus
Spined Woodborer, Pine Sawyer, Western Pine Sawyer, Ponderosa Pine Borer
Trichocnemis spiculatus is a large wood-boring beetle in the family Cerambycidae, native to western North America. It is notable as the largest wood-boring beetle species in Colorado and has served as inspiration for technological innovation—its opposable mandibles inspired the design of modern chainsaw chains with alternating right and left cutting teeth. The species develops in dead and dying conifers, primarily ponderosa pine and Douglas fir, with a multi-year life cycle. Larvae create extensive tunnel systems through sapwood and heartwood.