Frequency signatures: Toco Toucan to Tuatara

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 2,113–2,136.

Toco Toucan

MID

A Bill That Is Mostly Air

Reaching • Light • Radiating

That makes it a mid-frequency system: steady reaching in which one structure serves several purposes at once.

Tokay Gecko

LOW

Billions of Hairs and a Shout

Clinging • Molecular • Still

That makes it a bimodal system: silent clinging and aggressive announcement.

Tomato Frog

LOW

Inflate-and-Glue Skin

Conspicuous • Sedentary • Chemical

Because a cheap defence removes any need for speed or concealment, it is a low-frequency system.

Tooth-billed Pigeon

MID

Serrated Bill Fruit Opening

Sawing • Selective • Canopy

Because feeding runs as a steady daily cycle, it is a mid-frequency system.

Topi

MID

Mound Lookout, Alarm Channel

Grazing • Rising • Signalling

Continuous grazing joined to continuous shared watching makes this a mid-frequency system.

Toque Macaque

LOW

A Population Followed for Generations

Individual monkeys identified, named and followed continuously since the late 1960s at Polonnaruwa • Births, deaths, ranks, injuries and migrations recorded for every animal across their whole lives • Patterns emerging that no short study could detect, including how rank is inherited, how droughts remove cohorts and how lineages rise and fall

Because the patterns run across generations, it operates as a low-frequency system.

Trap-jaw Ant

HIGH

Latch-Held Mandible Spring

Cocked • Triggered • Reset

Tiny windows, enormous instantaneous output and constant repetition make this a single high-frequency system.

Trapdoor Spider

LOW

Hinged Door, Fixed Catchment

Sealed • Sedentary • Years

A very long almost costless occupancy paying for an extremely brief seizure makes this a bimodal system, low-frequency in the ground and high-frequency at the rim.

Trashline Orb-weaver

LOW

Sitting Among Its Own Rubbish

Prey husks, moulted skins, plant fragments and egg sacs fastened into a vertical line down the centre of the web • The spider sitting at the hub in the middle of that line, matched in size and colour to the debris around it • A searching predator presented with a row of similar objects, only one of which is alive

Because the line accumulates over days, it operates as a low-frequency system.

Tree Frog

MID

Toe Pads That Stick Wet

Pressing a broad toe pad against a leaf or a stem • Secreting a thin film of mucus between the pad and the surface • Holding on by the surface tension and viscosity of that film rather than by suction or glue

Since grips and jumps recur, it operates as a mid-frequency system.

Tree Hyrax

MID

Escalating Crack-Call Sequence

Nocturnal • Broadcasting • Gripped

Because the system depends on a repeated nightly broadcast and steady local foraging, it is a mid-frequency system.

Tree Pangolin

MID

Keratin Scales and a Gripping Tail

Climbing • Ant-raiding • Nocturnal

That makes it a bimodal system: steady nocturnal insect foraging and a brief, complete armoured closure.

Treehopper

MID

An Extra Structure on Top

Sitting still on a stem with a helmet that reads as a thorn or a piece of debris • Feeding on sap through the bark • Signalling to others through vibrations in the plant itself

Since feeding and signalling are continuous, it operates as a mid-frequency system.

Triangulate Combfoot

MID

Silk Thrown From a Distance

Waiting in a tangle web in a corner or under furniture • Flicking sticky silk over an entangled animal from a distance using a comb of serrated bristles on the hind legs • Approaching only once the prey is wrapped and immobile

Since captures recur, it operates as a mid-frequency system.

Trilobite Beetle

LOW

Flattened Shielded Larva-form

Flattened • Armored • Enduring

Because the system is built around continuous passive protection and slow, deliberate movement rather than bursts or switching modes, it is a single, low-frequency architecture.

Tripod Fish

LOW

Stilted Stand Facing the Current

Standing • Facing • Motionless

Because the whole system runs at almost zero output, it is a low-frequency system.

Tropical Carpenter Bee

MID

Mandible-Bored Nest Tunnel

Boring dead wood • Provisioning each cell • Sealing behind her

Because that cycle repeats steadily through the season, it operates as a mid-frequency system.

Tropical House Gecko

MID

Hunting at a Borrowed Light

Waiting on a wall beside an artificial light after dark • Taking moths and other insects that the light has already concentrated • Occupying a food supply created by human infrastructure rather than by any habitat

Because the pattern repeats nightly, it operates as a mid-frequency system.

Tropical Leatherleaf Slug

LOW

A Leathery Back, No Shell

Carrying a thick tough mantle covering the whole upper surface with no shell beneath it • Breathing through a single pore at the rear rather than a mantle cavity on the side • Burrowing into soil by day and grazing at night

Since the cycle runs across a year, it operates as a low-frequency system.

Tropical Two-wing Flyingfish

MID

Surface-glide escape frame

Cruising • Poised • Surface-led

This makes them a bimodal system: a mid-frequency, surface-oriented cruising state that exists mainly to keep them in launch position, and a high-frequency, short, intense escape-glide burst that turns immediate threat into forward flight and distance.

True Oyster

MID

Cementing Onto Their Own Dead

Drifting as larvae until they detect chemical cues from existing oyster shell • Cementing the left valve permanently to it • Growing into a three-dimensional structure built from generations of shells

Since filtering is continuous, it operates as a mid-frequency system.