Tipping-point-proximity-assessment
Guides
Cordulegaster erronea
tiger spiketail
Cordulegaster erronea, the tiger spiketail, is a large, uncommon dragonfly in the family Cordulegastridae. It is a habitat specialist requiring small, pristine, spring-fed forest streams with muck bottoms and overhanging vegetation. The species has a long larval period estimated at 3-4 years and a brief adult flight period of approximately 2-3 weeks in early summer. Radio-telemetry studies in New Jersey have revealed limited adult movement, with individuals typically remaining within 100-200 meters of natal streams and showing strong site fidelity.
dragonflyspiketailhabitat-specialistforest-streamradio-telemetryconservationNew-JerseyCordulegastridaeOdonataindicator-speciesheadwater-streamsmetapopulationterritorial-behaviorcrepuscular-activitylong-larval-developmentsite-fidelitymature-forest-dependentspring-fed-streamsmuck-bottom-streamsoverhanging-vegetationshaded-streamslimited-dispersalfragmented-populationspristine-habitataquatic-nymphovipositorearly-summer-emergencebrief-adult-lifecanopy-useeasily-disturbedhuman-disturbance-sensitivetop-predatorstream-ecosystemconservation-concernIUCN-Least-Concernstable-populationeastern-North-Americapatchy-distributionlocalized-populationsterritorial-malespatrolling-behavioroviposition-in-organic-matterspecialized-habitat-requirementsforest-protection-neededregulatory-protection-insufficientaquatic-insectodonateAnisopteraCordulegastroideaSelys-1878tiger-spiketailuncommon-speciesrare-encountersfield-identification-challengehabitat-degradation-threatforest-fragmentation-impactwater-quality-dependentperennial-streamsseepage-fed-streamsadjacent-forest-usemovement-ecologyhome-range-limitednatal-stream-fidelityconservation-recommendationsmature-forest-bufferstream-corridor-protectionheadwater-conservationforest-stream-specialistecosystem-engineerbiodiversity-indicatorclimate-change-vulnerabilityhabitat-loss-sensitivitydevelopment-pressureprotected-areas-benefitcitizen-science-potentialnatural-history-knowledge-gapresearch-priority-speciesmonitoring-targetpopulation-stabilityleast-concern-statusno-immediate-threatstable-IUCN-assessmentNorth-American-endemiceastern-rangeNew-Jersey-study-sitedetailed-life-history-knownradiotelemetry-pioneer-studyfirst-radio-telemetry-for-speciesmovement-studyhabitat-use-studyhome-range-estimationconservation-biology-case-studyforest-management-implicationsbuffer-zone-requirementsstream-protection-needsbeyond-stream-corridor-protectionforest-matrix-importancecanopy-connectivityshade-requirementsthermal-regime-sensitivityhydrological-stability-needsmuck-substrate-preferenceorganic-matter-ovipositionspecialized-reproductive-behaviorterritorial-defensemale-male-competitionfemale-habitat-usenon-breeding-habitat-useforaging-in-canopyroosting-behavioractivity-patterncrepuscular-peakmorning-activitylate-afternoon-activityhuman-disturbance-responseflight-initiation-distanceconservation-behaviormanagement-recommendationspolicy-implicationsregulatory-gapprotected-area-designlandscape-conservationmetapopulation-dynamicssubpopulation-connectivitycolonization-extinction-dynamicshabitat-patch-sizehabitat-patch-qualityhabitat-patch-isolationpopulation-viabilitydemographic-stochasticityenvironmental-stochasticitygenetic-diversity-concernsinbreeding-riskdrift-effectsconservation-genetics-needslong-term-monitoringadaptive-managementhabitat-restoration-potentialreintroduction-feasibilitycaptive-propagation-unnecessaryin-situ-conservation-priorityex-situ-conservation-not-indicatedsite-based-conservationstewardship-needseducation-valuenatural-heritage-significanceecotourism-potential-limitedresearch-tourism-potentialphotography-challengefield-observation-difficultyelusive-specieslow-detection-probabilitysurvey-methodology-needsenvironmental-assessment-indicatorimpact-assessment-speciesdevelopment-review-triggermitigation-requirementscompensatory-habitat-needsoffset-feasibility-limitedno-net-loss-challengehabitat-irreplaceabilityconservation-offset-unsuitableprecautionary-approach-warrantedenvironmental-planning-integrationstrategic-environmental-assessmentcumulative-effects-assessmentclimate-adaptation-planningrefugia-identificationassisted-migration-not-appropriatehabitat-management-guidelinesforest-management-integrationsilviculture-impactsharvest-timing-restrictionsbuffer-retentionriparian-zone-widthcanopy-retentionroad-impactssedimentation-sensitivitynutrient-loading-sensitivitychemical-contamination-sensitivitythermal-pollution-sensitivityflow-alteration-sensitivitygroundwater-dependencebaseflow-maintenancehydrological-connectivitywetland-complex-associationseepage-zone-protectionheadwater-protection-prioritywatershed-scale-conservationlandscape-context-importancematrix-quality-effectsedge-effects-sensitivityfragmentation-impactscorridor-needsstepping-stone-habitatnetwork-connectivitypopulation-source-sink-dynamicsdemographic-source-populationsrescue-effectstargeted-conservation-actionspecies-specific-managementhabitat-suitability-modelingdistribution-modeling-needsoccupancy-modeling-potentialdetection-probability-estimationsurvey-design-optimizationmonitoring-protocol-developmenttrend-analysis-needspopulation-status-assessmentthreat-assessmentrecovery-planning-not-triggeredprevention-oriented-conservationproactive-managementearly-intervention-opportunityconservation-investment-efficiencycost-effective-protectionpriority-site-identificationconservation-opportunity-mappingland-protection-strategieseasement-potentialfee-simple-acquisitionstewardship-agreement-needsmanagement-agreement-needsconservation-par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