Blue Ground Beetle
ExploreInsects
Blue Ground Beetle
carabus intricatus
The Blue Ground Beetle (Carabus intricatus) is one of Europe's most striking and rarest beetles. Renowned for its brilliant, iridescent blue-violet coloration, this impressive insect is a denizen of ancient, damp deciduous woodlands where it plays a vital role as a top invertebrate predator. Because of its specific habitat requirements and sensitivity to forest management, it serves as an excellent bioindicator of healthy, mature forest ecosystems. Encountering one of these glittering giants climbing a moss-covered oak at night is a thrilling highlight for any nature enthusiast. Historically widespread but now highly localized, it has become a major focus of conservation efforts, particularly in the United Kingdom where it was once thought to be extinct. Its remarkable survival in isolated pockets of old-growth temperate rainforest highlights the critical importance of preserving ancient woodland habitats.
Habitat: Typically found in damp, ancient deciduous woodlands, especially those with high humidity and abundant mossy tree trunks.
Appearance
Measuring up to 3.8 centimeters in length, this large beetle is easily recognized by its spectacular metallic purplish-blue sheen, which covers its head, thorax, and heavily textured elytra. Its body is elongated and somewhat flattened, with long, slender legs designed for rapid running rather than climbing. The elytra (wing cases) are covered in intricate, rough ridges and grooves, giving them a distinctively rugged appearance, and they are fused together, rendering the beetle completely flightless. Its head features powerful, forward-pointing jaws (mandibles) and long, thread-like antennae that it uses to navigate the dark forest floor.
KingdomAnimaliaPhylumArthropodaClassInsectaOrderColeopteraFamilyCarabidaeGenusCarabus
Category
InsectsRarity
Common
Danger
1/5 · Very low
Snaps
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Interesting facts
During the day, it avoids predators and desiccation by squeezing into tight crevices beneath damp bark or deep inside rotting logs.
It was thought to be extinct in the United Kingdom for several decades until a small, surviving population was rediscovered in Devon in 1994.
The Blue Ground Beetle is completely flightless, as its hind wings are vestigial and its beautiful blue elytra are completely fused together.
Special abilities
Ability
Specialized Snail Hunting
Equipped with long, narrow mandibles designed specifically to reach inside snail shells and slice through soft mollusc tissue.
Ability
Chemical Defense Secretion
When threatened, it can spray a foul, noxious liquid from its abdomen to deter birds, small mammals, and other predators.
Ability
Agile Night Climbing
Unlike many ground beetles, it has evolved highly grippy tarsi, allowing it to scale vertical mossy tree trunks at night to hunt tree slugs.
Measurements & details
- Length
- 2-4 cm
- Weight
- 0.001-0.003 kg
- Lifespan
- 2-3 years
- Clutch Size
- 10-30
- Incubation
- 14-20 days
Diet & Feeding
A predatory carnivore that specializes in hunting large land snails, slugs, and earthworms on the forest floor and up mossy tree trunks at night.
Primary Foods
- Ashy Black Slug
- Lemon Slug
- Land Snails
- Earthworms
Foraging Method
- Pursuit Division Search To Active Capture Of Prey. It Scales Trees At Night To Search For Arboreal Slugs. Used: Pursuit. Check Constraints: Pursuit, Ambush, Foraging, Grazing, Filtering. Let Us Use Pursuit. Wait, Diet Details.huntingmethod Is Nullable. Yes, Let Us Put: Pursuit. Just One Of Those Is Fine. Let's Write 'pursuit'. Check Schema: Required: ['maindiet', 'dietsummary', 'primaryfoods']. 'huntingmethod' Is Optional/nullable. Let's Use 'pursuit'. Let's Correct The Flat Json String To Avoid Any Issues. Let Us Re Verify: "huntingmethod":"pursuit" Is Fine. Let's Do That. Wait, Primaryfoods Can Just Be Names. Let's Do: ["ashy Black Slug", "lemon Slug", "land Snails", "earthworms"]. Dietchangeswithage: String Or Null. Let's Write "both Larvae And Adults Are Predatory, But Larvae Are Strictly Ground Dwelling And Target Smaller Soft Bodied Invertebrates."
Ecological connections
hunts
Ashy Black Slug
Limax cinereoniger
The Blue Ground Beetle is a specialized predator that actively hunts and feeds on this large forest mollusc.
competitor
Violet Ground Beetle
Carabus violaceus
Competes for prey resources, shelter, and territory within the same ancient woodland leaf litter habitats.
eaten by
Eurasian Badger
Meles meles
A nocturnal mammalian predator that digs through forest litter and consumes large beetles as part of its opportunistic diet.
Traits
No trait badges are assigned for this object yet.
Also known as
No aliases listed yet.
Collections
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Safety
Danger
1/5 · Very low
No special safety notes yet.
Frequently Asked Questions
How to identify Blue Ground Beetle?
The easiest way to identify Blue Ground Beetle is to use the Snappit nature identifier app.
How long is Blue Ground Beetle?
2-4 cm
How much does Blue Ground Beetle weigh?
0.001-0.003 kg
How long does Blue Ground Beetle live?
2-3 years
What does Blue Ground Beetle eat?
A predatory carnivore that specializes in hunting large land snails, slugs, and earthworms on the forest floor and up mossy tree trunks at night.
Where is Blue Ground Beetle usually found?
Typically found in damp, ancient deciduous woodlands, especially those with high humidity and abundant mossy tree trunks.
How does Blue Ground Beetle hunt?
Pursuit Division Search To Active Capture Of Prey. It Scales Trees At Night To Search For Arboreal Slugs. Used: Pursuit. Check Constraints: Pursuit, Ambush, Foraging, Grazing, Filtering. Let Us Use Pursuit. Wait, Diet Details.huntingmethod Is Nullable. Yes, Let Us Put: Pursuit. Just One Of Those Is Fine. Let's Write 'pursuit'. Check Schema: Required: ['maindiet', 'dietsummary', 'primaryfoods']. 'huntingmethod' Is Optional/nullable. Let's Use 'pursuit'. Let's Correct The Flat Json String To Avoid Any Issues. Let Us Re Verify: "huntingmethod":"pursuit" Is Fine. Let's Do That. Wait, Primaryfoods Can Just Be Names. Let's Do: ["ashy Black Slug", "lemon Slug", "land Snails", "earthworms"]. Dietchangeswithage: String Or Null. Let's Write "both Larvae And Adults Are Predatory, But Larvae Are Strictly Ground Dwelling And Target Smaller Soft Bodied Invertebrates."
How many eggs does Blue Ground Beetle lay?
10-30
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