Frequency signatures: Northern Pike to Olingo
Each card gives a species’ behavioural archetype, its frequency — how often it commits effort and how long each commitment lasts — and a waveform tracing that rhythm.
Frequency signatures
Each waveform traces one species’ working rhythm — where it spends effort, and where it waits. 2,327 species, A–Z; showing 1,465–1,488.
Northern Pike
An S-Bend Released
Holding motionless among weed with fins barely moving • Curving the body into an S with the tail cocked • Straightening it in a fraction of a second to arrive at the prey
Since strikes occur in a fraction of a second, it operates as a high-frequency system.
Northern Shoveler
Lamellae Filter Sweep
Sweeping • Filtering • Continuous
That makes it a mid-frequency system: rhythmic and steady, converting volume into calories rather than capturing anything individually.
Northern Snakehead
A Fish That Leaves Water
A suprabranchial chamber above the gills acting as a lung and requiring air from the surface • Surviving out of water for days while the skin and that chamber stay moist • Wriggling across wet ground between water bodies rather than being confined to one
Because surfacing is continuous, it operates as a mid-frequency system.
Northern Stargazer
Sand-Embedded Ambush Circuit
Buried • Waiting • Concealed
That makes its system a clear bimodal pattern: a dominant low-frequency conceal-and-wait phase, punctuated by brief, high-frequency strike bursts when opportunity enters the narrow kill zone.
Northern Tamandua
A Stomach That Does the Chewing
Opening a nest • Collecting with the tongue • Grinding in the gut
This is a mid-frequency system.
Norway Lobster
Emerging at One Light Level
Leaving the burrow to forage when light at the seabed falls to a narrow band • Walking over mud taking worms and carrion • Returning before the light changes again
Applying the structural test, out and in are two different states with different exposure, physiology and availability, making this a bimodal system.
Nubian Ibex
Rubber-Soled Hooves on Desert Cliffs
Browsing • Herding • Water-bound
That makes it a bimodal system: steady browsing near water and sudden climbs to safety.
Numbat
Daylight Shallow-Gallery Licking
Diurnal • Licking • All day
Because the whole day is one action repeated at a steady rate, it is a mid-frequency system.
Nurse Shark
A Shark That Can Stop Swimming
Resting • Pumping • Sucking
That makes it a low-frequency system: economical, stationary and built around extraction rather than pursuit.
Nutmeg Mannikin
Granivore Flock Harvester
Rhythmic • Flocking • Forager
This produces a mid-frequency system: not a single long wait or one explosive burst, but steady, repeated cycles of collective seed gathering across the day and season.
Nyala
Two Animals in One Species
A male at around twice the female mass, slate grey to dark brown, shaggy-coated with a long dorsal crest and spiral horns
The two sexes occupy the same riverine woodland in southern Africa and feed on much the same browse, but they are solving different problems with different bodies, and the architecture rather than the behaviour is what differs, so it operates as a bimodal system.
Oarfish
Vertical Undulating Fin Hover
Vertical • Rippling • Mid-water
Because the whole system runs continuously at a very low output, it is a low-frequency system.
Ocean Quahog
Metabolic Shutdown Under Cold Sediment
Filtering • Burrowed • Slow-growing
That makes it a low-frequency system: continuous slow filtering punctuated by metabolic shutdown.
Ocean Sunfish
Jelly Diet, Thermal Shuttle
Sculling • Descending • Rewarming
Continuous drifting, diving and feeding makes this a mid-frequency system.
Oceanic Whitetip Shark
Long-Pectoral Low-Cost Cruising
Gliding • Wide-finned • Continuous
Because the system runs continuously at very low cost rather than in bursts, it is a low-frequency system.
Ocellated Antbird
Understory Raid Listener
Rhythmic • Tracking • Opportunist
Because their whole feeding system is built around this ongoing, coordinated following of another species’ movement rather than long fasting or singular explosive strikes, the ocellated antbird is best understood as a mid-frequency system with rhythmic, repeatable engagement.
Ocellated Lizard
Blue on the Flanks Only
Basking • Ranging • Ducking in
Repeated foraging trips from cover make this a mid-frequency system.
Ocelot
Pattern That Needs Its Background
Patrolling • Stalking • Holding a territory
Steady nightly patrolling of a held territory makes this a mid-frequency system.
Oertzen's Lizard
Crevice Refuge Circuit
Sheltered • Hidden • Restorative
That makes this a bimodal system with a dominant low-frequency refuge mode anchored by rock structure, and a moderate, repeatable excursion mode for feeding and maintenance.
Ogre-faced Spider
The Held-Net Interceptor
Motionless • Ready • Watching
That makes the spider a bimodal system: an extremely cheap prepared state and a brief, total commitment.
Oilbird
Audible Click Cave Navigation
Clicking • Inside • Total darkness
Because both are essential and both are distinct, it is a bimodal system.
Okapi
Light-Barred Rump Disruption
Solitary • Silent • Broken-outlined
Because the system runs on stillness, solitude and minimal signal, it is a low-frequency system.
Oleander Hawk-moth
A Caterpillar That Eats Oleander
Larvae feeding on oleander, whose tissues carry cardiac glycosides that stop a vertebrate heart • Those compounds tolerated rather than avoided, through target-site changes and rapid excretion • A food plant left almost untouched by other insects, available in quantity wherever it grows
Because the cycle is generational, it operates as a low-frequency system.
Olingo
A Tail That Cannot Grip
Crossing branches • Feeding on fruit • Returning before light
Continuous nightly foraging across connected canopy makes this a mid-frequency system.