:
Swarmlord, an infamous & powerful Hive Tyrant, possess more mental autonomy than any bioforms, even other Hive Tyrants. Able to outwit the enemy & leading the swarm with more tactical approach

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NidFact:
"Shadow in the Warp" is a phenomenon whenever Hive Fleets are close by, all connections to Immaterium is blocked. Thus greatly affect psychic users and disrupts Warp travel as well psychic communication.

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NidFact:
Old One Eye is a unique Carnifex first seen during Hive Fleet Behemoth assault on Calth. Rumored to have been killed multiple times only to reappear later & reportedly seen throughout other Hive Fleets

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NidFact:
Gargoyles are capable spitting caustic venom which it instinctively aim for prey's eyes, blinding them and making them vulnerable for Gargoyle's barbed tail attacks or other bioform's onslaught

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NidFact:
During Hive Fleet Gorgon's "repelled" from Pagrius System, unbeknownst of Imperial Guards that the agri-world's food source are poisoned by Gorgon's toxic spores. Causing severe casualties to system's populace.

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NidFact:
While other Hive Fleets are "nomadic" nature, Hive Fleet Tiamet resides in Tiamet System. Consume little planet system's biomass as well aggressively defends it's territory from any intruders.

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NidFact: Tyranids are potent psychic user, but they do not attract Chaos Warp entities. With many believed it's because Tyranid itself lacks any "soul" for Chaos to harvest upon.

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NidFact:
Fleshborer's ammunition called "Borer Beetle" are blind yet voracious where on impact it'll bore into the flesh & spend the rest of it's mere seconds-long lifespan devouring the victims from within.

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NidFact:
Tyranid's "FTL travel" are use of 'Narvhal' bioships by manipulate star system's gravity well, cause it to suck the Hive Fleets to next destination at sub-light speed. Slower, yet more reliable than Warp travel

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NidFact:
Tyrannocyte is a "living drop pods" that after disgorges it's payloads, it refill itself with gases which it float itself drifting into air & provide fire support with it's multi bioweapons (Balloons with guns)

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NidFact:
Vanguard bioforms such as Lictors & Genestealers are capable operating outside Hive Mind's Synaptic control, instinctively driven to what it's purpose on targeted world for the Hive Fleets

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NidFact:
Most Tyranid "weaponry" are living being itself and are symbiotically connected to the bioform in such unison that, in certain bioforms, it is difficult to determine which is actually the "user".

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NidFact:
Spinefist are connected to bioform's lungs via bioweapon's long tube-like "tail" & capable "firing" hail of neuro-toxin coated spines through the sharp exhalation of users.
(Essentially glorified blowgun)

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NidFact:
Hormagaunts are highly ravenous & possess hyper-accelerated metabolism with each prey killed & consumed only fuel it to seek out more prey to satiate it's insatiable hunger.

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NidFact:
Due to presence of fused ribcage & "Black Carapace" commonly found in Space Marine, Tyrant Guard rumored to be created from Space Marine's DNA though Imperium officials continuously deny this theory.

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NidFacts:
When diving for a kill, Harpy produce ear-splitting shriek that is excruciating painful to lesser enemies i.e Orks & Humans but prove fatal to those with highly developed senses such as Aeldari.

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NidFact: Harridan is an enormous drake/wyvern-like bioform often acts as "brood mothers" for Gargoyles, guiding & carrying flocks of them on it's undersides to their enemy's destination to strike.

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NidFact:
"Screamer Beetle" is a special living ammunition type for Gaunt's Fleshborer, when fire produce nightmarish ear-splitting shriek in which salvoes of this causes psychological affect & demoralizes the enemies

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NidFact:
Lictors exudes pheromone trail in which the larger amount of prey located, the stronger it's potency & attracts other bioforms to it's position. Not even killing Lictor will stop the alerted Tyranid pursuit.

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NidFact:
Impaler Cannon's spine shards each have small winged bioform called 'shard beast' latched on it that when fired, it'll "guide & steer" the shard to it's target with high accuracy even behind cover.

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