Frequency signatures: Island Fox to Jerboa
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 1,153–1,176.
Island Fox
A Dwarfed Canid Awake by Day
Omnivorous • Paired • Day-active
Because the system is a steady, omnivorous routine spread across day and night, it is a mid-frequency system.
Jabiru
Following the Shrinking Pool
Wading • Feeling • Snapping
Continuous deliberate wading makes this a mid-frequency system.
Jackdaw
Cavity-Site Substitution
Colonial • Substituting • Sociable
That makes the jackdaw a mid-frequency system: rhythmic and social, whose adaptability comes from a requirement loose enough to be met by new materials.
Jackson's Chameleon
Colour Aimed at Another Animal
Shifting pigment cells and reflective crystal layers within seconds • Producing high-contrast display colours during rival encounters and courtship • Returning to muted greens when no other chameleon is present
Because encounters recur, it operates as a mid-frequency system.
Jaguar
Skull-Piercing Ambush Bite
Stalking • Dappled • Patient
Because a patient concealed approach exists to deliver one uncontested crushing commitment, this is a bimodal system.
Jaguarundi
Taking the Shift Nobody Else Works
Hunting in daylight • Moving low through cover • Avoiding the night crowd
Continuous daytime activity makes this a mid-frequency system.
Jambu Fruit Dove
A Gape That Decides
A wide flexible gape that swallows fruit whole rather than pecking pieces from it • Seeds passing through the gut intact and being voided in flight far from the parent tree • Fruits above the gape width taken by nothing at all, so which trees are dispersed depends on a measurement of the bird
Because the cycle runs seasonally, it operates as a low-frequency system.
Japanese Beetle
Feeding Beetles Call in More
Grubs feeding on grass roots for most of a year • Adults emerging and skeletonising leaves • Damaged foliage and feeding beetles drawing in still more
Since a generation takes a year, it operates as a low-frequency system.
Japanese Bush Warbler
A Loud Song From a Bird That Stays Hidden
Singing a long carrying whistle from dense cover • Holding territory by sound alone • Never showing itself
Since bouts of song repeat through the day, it operates as a mid-frequency system.
Japanese Macaque
Behaviour Spread Through the Troop
A young animal inventing a way of handling food • Kin and playmates copying it first • The practice becoming standard in a troop and passing to the next generation
Since interactions recur continuously, it operates as a mid-frequency system.
Japanese Marten
Seasonal Menu Switching on Agile Limbs
Roaming • Omnivorous • Seasonal
That gives a bimodal system of wide-ranging MID foraging punctuated by HIGH pursuit.
Japanese Quail
A Generation in Six Weeks
Hatching precocial and feeding within a day • Reaching sexual maturity at about six weeks • Laying almost daily thereafter
Since laying and development recur within days, it operates as a high-frequency system.
Japanese Sea Nettle
A Bloom From the Seabed
A tiny polyp attached to hard substrate on the seabed, budding slowly and persisting for years as a stable colony
The two stages are not versions of one another but separate architectures, benthic and attached against pelagic and drifting, connected by a threshold, so it operates as a phase-change system.
Japanese Serow
Every Ledge Already Memorised
Small range • Scent-marked • Walked for years
Sedentary, solitary and slow-breeding, this is a low-frequency system.
Japanese Spider Crab
Reach Bought With Fragility
Walking slowly across deep soft bottom • Reaching food without moving the body • Carrying a shell far too small to shelter the legs
Since moults are years apart, it operates as a low-frequency system.
Java Mouse-deer
Gap-Threading Undergrowth Creep
Frequent • Small • Concealed
Because the animal runs on frequent small returns and continuous cautious movement rather than on stored fat or explosive escape, it is a mid-frequency system.
Javan Myna
Neophilic Urban Scavenging
Approaching the new • Working food courts • Roosting in thousands
Because the investigating and feeding run continuously through the day, it operates as a mid-frequency system.
Javan Pond Heron
Ricefield Cycle Stalking
Walking the bund • Standing over shallow water • Striking often
Because the stalking and striking run together through every workable stage of the cycle, it operates as a mid-frequency system.
Javan Rhinoceros
Mud Wallow Thermal Control
Wallowing • Coated • Daily
Because the whole system runs at a very low rate, it is a low-frequency system.
Javan Rusa Deer
Antlers Loaded With Grass
A stag in rut thrashing its antlers through vegetation and gathering grass, vines and foliage into them • That material carried and displayed on the antlers during contests and courtship, making the rack appear substantially larger • Rivals and females assessing the whole loaded structure rather than the bone alone
Because the rut is annual, it operates as a low-frequency system.
Javan Slow Loris
Brachial Gland Venom Bite
Armed • Deliberate • Nocturnal
Because everything runs slowly, it is a low-frequency system.
Javan Surili
Branch-Linked Canopy Traveller
Rhythmic • Linked • Arboreal
Because its whole system is built around ongoing, connected canopy travel rather than long stillness or sudden explosive bursts, its operating rhythm is a single, coordinated mid-frequency mode.
Javanese Grasshopper
A Leg Cocked Like Crossbow
Muscle in the hind femur contracting slowly against a locked joint rather than extending the leg • Elastic protein in a thickened band storing that energy while the joint is held closed • The catch released so the whole store discharges in a few thousandths of a second
Because the release takes milliseconds, it operates as a high-frequency system.
Jerboa
Bones Fused So Nothing Flexes
Bounding • Changing direction • Back underground
Short, volatile and explosive, this is a high-frequency system.