Frequency signatures: Jerusalem Cricket to Kipunji
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 1,177–1,200.
Jerusalem Cricket
Burrow-Bound Body and Abdomen Drumming
Burrowing • Slow-growing • Buffered
Years of slow, soil-buffered growth with little wasted movement, plus a repeated vibration code for finding partners, make it a bimodal system: low-frequency life underground with a mid-frequency drumming rhythm.
Jewel Beetle
Iridescent Bark Armor
Rhythmic • Posture-led • Display
This produces a mid-frequency system built around rhythmic, posture-led use of metallic armor as a visibility filter rather than either pure stillness or explosive bursts.
John Dory
Approaching Edge On and Vanishing
Turning to face prey so only a thin edge is presented • Easing forward with fin movements alone • Shooting a protrusible jaw tube forward at the last moment
Since strikes recur through the day, it operates as a mid-frequency system.
Joro Spider
Spiderlings Carried on a Thread
Anchored • Golden • Layered
That makes it a bimodal system: a long anchored adult life and one brief airborne event.
Jumping Spider
Eyes Built Like a Telescope
Scanning with a pair of large forward eyes on a long tube • Moving the retina behind a fixed lens to sweep the image • Stalking and jumping only once the target is identified
Since scans and jumps recur constantly, it operates as a high-frequency system.
June Beetle
Years Eating Roots Unseen
Larvae living in soil for two to three years feeding on grass and crop roots • Damage appearing above ground as wilting and dieback with no visible cause • Adults emerging in a synchronised flush for a few weeks to feed on foliage and mate
Because development runs across years, it operates as a low-frequency system.
Kagu
Nasal Corn Soil Probing
Probing • Listening • Forest floor
Because the day is a steady repeated cycle of listening and probing, it is a mid-frequency system.
Kakapo
Rimu Mast-Triggered Breeding
Non-breeding • Solitary • Most years
Because the two states are both essential and the animal cannot function in only one, it is a bimodal system.
Kakarratul
Subsurface Sand Swimmer
Hidden • Subsurface • Steady
All of this makes Kakarratul a low-frequency system: dense, hidden, and committed to slow, subsurface movement that almost never breaks cover.
Kea
Object-Testing Foraging Search
Digging • Probing • Routine
Because context genuinely selects between a routine operating state and an investigative one, this is an adaptive system.
Keel-billed Toucan
A Bill Used on Each Other
Flocked • Fencing • Tossing
That makes it a mid-frequency system: steadily active and continuously social.
Kemp's Ridley Sea Turtle
Daylight Mass Landing on One Coast
Foraging • Bottom-feeding • Crushing
That makes it a bimodal system: dispersed bottom foraging and brief synchronized nesting.
Kenya Tree Coral
Letting Go of Limbs
Growing as a branched upright colony that continues to extend at the tips • Constricting at the base of a branch until it detaches and drifts away • That fragment settling on nearby substrate and establishing as a genetically identical new colony
Because the cycle runs over months, it operates as a low-frequency system.
Kiang
Thin Blood, Not Thick, at Altitude
Grazing at five thousand metres • Travelling far • Breathing half the oxygen
Sustained daily travel makes this a mid-frequency system.
Kikiki Huna Fairyfly
Bristle-Winged Miniature Body
Miniature • Enclosed • Economical
The design spends very little material on anything, and growth is paid for by one closed parcel rather than by continued feeding, which places the system at the low-frequency end; how the adult finds its hosts remains the main unknown.
Killdeer
Leading a Predator Away
Slipping off the nest before the predator sees it • Dragging a wing and calling loudly at a distance from the eggs • Recovering and flying once the pursuer has followed far enough
Since displays recur through the season, it operates as a mid-frequency system.
King Bird-of-paradise
Miniature Signal Choreography
Perched • Poised • Foraging
That creates a bimodal rhythm: a mid-frequency life of steady perch-to-perch feeding and vigilance, punctuated by short, high-frequency bursts of royal display where all that control is spent in seconds.
King Cobra
Snake-Tracking Venom Dose
Searching • Tracking • Deliberate
Because the system runs on sustained searching and deliberate engagement rather than on waiting or exploding, it is a mid-frequency system.
King Eider
Shells Crushed in the Gizzard
Diving deep • Swallowing molluscs whole • Grinding them apart
Repeated daily diving makes this a mid-frequency system.
King of Saxony Bird-of-paradise
Two Enamel-Flagged Plumes on Bare Shafts
Foraging • Frugivorous • Canopy
That makes it a bimodal system: routine canopy foraging and bouts of calling and display.
King Penguin
Diving to Where the Layer Sits
Descending • Pursuing • Repeating
That makes it a bimodal system: repeated deep foraging and long periods of paying out reserves without input.
King Vulture
Opening What the Smellers Found
Soaring above canopy • Following smaller vultures down • Tearing the hide open
This is a low-frequency system.
Kinkajou
A Carnivore With a Tongue for Flowers
Hanging • Probing • Pollinating
That makes it a mid-frequency system: steady, continuous canopy foraging.
Kipunji
Honk-Bark Group Spacing
Calling • Grouped • Daily
Because calling and travelling run as a steady daily cycle, it is a mid-frequency system.