Frequency signatures: Hyacinth Macaw to Isabella Tiger Moth
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 1,129–1,152.
Hyacinth Macaw
Palm-Nut Cracking Bill
Paired • Cracking • Palm-tied
Because the system converts repeated mechanical work into a steady return, it is a mid-frequency system.
Iberian Lynx
Single-Prey Rabbit Dependence
Rabbit-bound • Patrolling • Daily
Because hunting runs as a steady daily cycle, it is a mid-frequency system.
Ibisbill
Under-Stone Bill Sweep
Probing • Wading • Grey-on-grey
Because returns come from many small identical probes repeated for hours, it is a mid-frequency system.
Ili Pika
Cut-and-Cure Hay Stacking
Cutting • Curing • Short summer
Because neither state can be removed without the animal failing, it is a bimodal system.
Impala
Scatter in Every Direction
Mixed feeding • Edged • Alert
That makes it a bimodal system: steady mixed feeding and a brief co-ordinated scatter.
Inca Tern
Plumes That Report Body Condition
Working the Humboldt current • Feeding • Carrying a measurable ornament
This is a mid-frequency system.
Indian Earthworm
Subsoil Passed Through and Deposited
Soil swallowed at depth, ground with grit in the gizzard and passed through a gut that adds mucus, enzymes and microbes • The processed material voided as casts on the surface rather than where it was taken from • Many tonnes per hectare per year moved upward this way, so the whole profile is turned over from below without anything being dug
Because the process runs continuously over years, it operates as a low-frequency system.
Indian Muntjac
Fighting With Tusks, Not Antlers
Solitary • Browsing • Thicketed
That makes it a bimodal system: solitary quiet browsing and a brief close-quarters contest.
Indian Peafowl
Rattled Eyespot Train
Displaying • Grown • Shed
That makes it a mid-frequency system: a steady foraging rhythm carrying a costly seasonal signal.
Indian Pied Myna
A Roost Passing Directions
Hundreds of birds converging on the same trees at dusk from feeding areas across a wide radius • Birds that fed poorly following birds that fed well when the roost disperses at dawn • Information about where food is spreading through the roost without anything being deliberately communicated
Because the cycle is daily, it operates as a low-frequency system.
Indian Rhinoceros
Fighting With Teeth, Not Horn
Carrying enlarged lower incisors that grow into tusks • Slashing with them in serious fights between males • Using the horn for digging and display rather than for combat
Since the cycle runs across years, it operates as a low-frequency system.
Indian Rock Python
A Cold Animal Making Its Own Heat
Coiled on the clutch • Shivering • Weeks without feeding
That is a bimodal system of long costly waiting and a very brief kill.
Indian Star Tortoise
Radiating-Line Outline Disruption
Patterned • Domed • Monsoon-paced
Because the whole system is slow and seasonally bounded, it is a low-frequency system.
Indo-Pacific Horseshoe Crab
Blood That Clots Around Bacteria
Circulating amebocytes in copper-based blue blood • Having those cells clot instantly around bacterial endotoxin • Sealing an infection into a gel before it can spread through an open circulatory system
Since the cycle runs across years, it operates as a low-frequency system.
Indo-Pacific Tarpon
A Gas-Breathing Swim Bladder
Gulping air at the surface • Passing it into a lung-like swim bladder • Holding position in water too poor for gills
Since surfacing recurs through the day, it operates as a mid-frequency system.
Indochinese Box Turtle
Hinged Plastron Complete Closure
Closed • Sealed • On demand
Because nothing about the animal happens quickly, it is a low-frequency system.
Indochinese Tiger
An Intact Forest With Nothing In It
Holding a huge territory • One large kill • Days at the carcass
Large infrequent kills and long quiet intervals make this a low-frequency system.
Indonesian Blue-tongued Skink
Last-Moment Ultraviolet Gape
Moving slowly • Holding the bluff • Opening everything at once
Because everything else about the animal is slow and continuous, it operates as a low-frequency system.
Indri
Rhythmic Family Chorus Spacing
Singing • Spaced • Most mornings
Because the singing and moving run as a steady daily cycle, it is a mid-frequency system.
Indus River Dolphin
Side-Swimming Flipper Trail
Sideways • Trailing • Continuous
Because scanning and swimming run continuously, it is a mid-frequency system.
Io Moth
Hindwing Eyespot Flash
Folded • Cryptic • Unfed
Because a near-zero resting state is paired with an instantaneous full-commitment display, this is a bimodal system.
Iridescent Shark
Flood-Pulse Upstream Schooling
Moving with the shoal • Reading the rising water • Running upstream
Because the movement is continuous, collective and sustained over weeks, it operates as a mid-frequency system.
Iris Lorikeet
Everything Inside One Island
A total world range confined to Timor and Wetar and nothing beyond • Dependence on remnant eucalypt and monsoon forest that occurs only in parts of that island • No possibility of movement to any other population because none exists
Because the pressures run across years, it operates as a low-frequency system.
Isabella Tiger Moth
A Caterpillar That Freezes Through
An active larva feeding, growing and moulting through the warm months in the ordinary way
These are not degrees of the same state; one is a metabolising animal and the other is a frozen object with its chemistry suspended, so it operates as a bimodal system.