Frequency signatures: Eastern Indigo Snake to Electric Catfish
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 697–720.
Eastern Indigo Snake
Burrow-Linked Active Forage
Ranging • Searching • Burrow-based
Because the system converts continuous searching effort into a steady return, it is a mid-frequency system.
Eastern Lesser Bamboo Lemur
Living on the Grass Other Primates Refuse
Stripping • Chewing • Resting
The system is therefore bimodal, dominated by slow processing and rest, with a smaller mode of vertical clinging and leaping through upright stems around dawn and dusk.
Eastern Lubber Grasshopper
Too Slow to Run
Walking rather than flying or jumping, on wings too small to use • Advertising with bright yellow, red and black • Hissing, spreading the wings and producing a foul froth from the thorax when handled
Since the cycle runs annually, it operates as a low-frequency system.
Eastern Newt
A Land Stage Between Two Water Stages
Eft • Terrestrial • Toxic
That makes it a bimodal system: two genuinely different bodies, each suited to a medium the other could not use.
Eastern Phoebe
Sallying Out and Coming Back
Watching from a low exposed perch • Launching to take an insect in the air • Returning to the same perch and pumping the tail
Since sallies recur within seconds, it operates as a high-frequency system.
Eastern Quoll
Wide Night-Ground Sweep
Sweeping • Opportunistic • Nightly
Because returns come from many small finds repeated nightly, it is a mid-frequency system.
Eastern Rat Snake
Concertina Vertical Climbing
Wedging against bark • Gripping with belly scales • Reaching nests nothing else can
Since a climbing season and a physiologically suppressed winter are both obligatory and neither is a slowed version of the other, this is a bimodal system.
Eastern Red-backed Salamander
No Lungs at All
Damp • Lungless • Territorial
That makes it a low-frequency system: small, slow and defined entirely by a constraint.
Eastern Screech Owl
Bark-Coloured Perch and Pounce
Roosting • Cryptic • Cavity-bound
That makes it a bimodal system: concealed daytime roosting and night-time perch-and-pounce hunting.
Eastern Slow-worm
Covert Lizard with Shedding Tail
Covert • Slow • Lizard-built
Slow warming, slow prey and a long life keep spending low almost all the time, yet the fracture plane allows one sudden, costly escape, so the system is bimodal: a low-frequency routine with a high-frequency emergency release.
Eastern Spiny Lizard
A Signal Under the Body
Carrying brilliant blue patches on the belly and throat that are invisible from above • Doing push-ups on a rock to flash them sideways and downward • Being a mottled grey-brown animal the rest of the time
Since displays recur through the day, it operates as a mid-frequency system.
Eastern Tiger Swallowtail
Staged Disguise Through Instars
Passing as a dropping • Swelling into eyespots • Everting a forked gland
Because the feeding and growing run continuously, it operates as a mid-frequency system.
Eastern Yellowjacket
A Colony Dying Each Autumn
A single mated queen emerging from hibernation in spring and building the first cells and raising the first workers entirely alone
The two states are structurally different systems rather than stages of one, separated by a threshold the colony crosses, so it operates as a phase-change system.
Eciton Army Ant
Nomadic Raid Conveyor
Packed • Sheltered • Reset
Because the whole system alternates between a compact, protective low-output bivouac and a high-output, high-mobility raid, the Eciton army ant is a bimodal system with a low-frequency rest core and a defining high-frequency marching appetite.
Eclectus Parrot
Hollow-Guarding Red Plumage
Female at the hollow • Male ranging • Both running at once
Because the provisioning and the guarding proceed together through most of the year, it operates as a mid-frequency system.
Edible-nest Swiftlet
A Nest Made of Saliva
Producing thick salivary secretion from enlarged glands during the breeding season • Drawing it out in strands against a vertical cave wall • Letting it harden into a shelf of cemented saliva with nothing else in it
Since building continues over weeks, it operates as a mid-frequency system.
Egyptian Cobra
A Hood Above a Snake-Eater
Ranging • Displaying • Eating rivals
Continuous wide-ranging hunting makes this a mid-frequency system.
Egyptian Fruit Bat
Nocturnal Echo Network
Rhythmic • Coordinated • Vocal
That pattern makes them a mid-frequency system: steady, coordinated activity maintained by regular communication pulses through the active period.
Egyptian Goose
Taking a Nest Already Built
Locating an occupied nest in a tree hole, a cliff ledge or another bird's stick nest • Driving out the residents by direct attack • Laying and raising a brood in the site without building anything
Since encounters recur through the season, it operates as a mid-frequency system.
Egyptian Mongoose
Feint, Dodge and a Toxin-Blind Receptor
Foraging • Diurnal • Cover-bound
The result is a bimodal system: steady foraging through cover and short, explosive confrontations when prey fights back.
Egyptian Plover
Riverbank Sentinel Forager
Vigilant • Attentive • Coordinated
Because their structure is built around a steady, shared watch punctuated by short, decisive reactions, the Egyptian Plover operates as a bimodal system with a mid-frequency cooperative vigilance mode and a high-frequency reactive burst mode.
Egyptian Tortoise
Small Enough to Shelter Under a Shrub
Sheltering • Inactive • Heat-avoiding
The system switches between a low sheltering phase and a productive rainy-season phase.
Electric Blue Acara
Pair-Guarded Spawning Stone Display
Displaying • Guarding • Paired
Because defence is a steady cycle of displays and brief chases kept up across the whole brood period, rather than one long build or a single explosive fight, the system runs at a mid-frequency rhythm.
Electric Catfish
One Nerve Cell Firing Everything
Lying still in murky water • Spending almost nothing • Waiting
That is a bimodal system.