Every eagle is a stack of tissues that must agree under season, prey and human pressure.
Meters below repeat the six atlas scores as gauges; they are relative marks, not laboratory certificates.
Systems
Support and integument
A fused carpometacarpus, large ungual talons and a hooked bill define the killing kit. Sea eagles add a heavier tarsus for fish; booted eagles add feathered tarsi for cold and mammal prey.
Feeding apparatus
Sit-and-wait on a commanding perch, then a short powered chase or a long stoop. Kleptoparasitism on ospreys saves hunt energy on salmon rivers. The feeding kit sets the ecological-role score relative to the other 23 types.
Respiration and circulation
Gas exchange and blood flow are tuned to the eagle energy budget -- dive, hover, sprint or bulk browse -- not to a generic vertebrate template.
Senses and neural control
A fovea dense with cone cells supports high-acuity prey detection at distance. Oil droplets and a pecten oculi are the usual avian optical extras.
Reproduction and ontogeny
Replacement rate is the hidden resilience number. Wing loading limits closed-canopy pursuit. Lead, rodenticides and turbine blades are modern ceilings that talons cannot solve.
Thermoregulation and salt/water
Climate and osmoregulation bound where a eagle can close its daily budget. Field sites in the English-speaking world still measure that envelope first.
Relative meters
Hotspots
Primary weapon or tool
The bill, teeth, trunk, pouch or talon that field guides name first -- and that trade or conflict usually targets.
Energy store
Fat, cache, crop or bamboo hours that decide whether a season closes.
Natal or breeding site
A redd, eyrie, den, anemone or ice lair -- often a single-point risk (Izumi, Natron, Gir).
Sensory organ
A fovea dense with cone cells supports high-acuity prey detection at distance. Oil droplets and a pecten oculi are the usual avian optical extras.
Human interface
Hunt, tourism, film or quota -- the surface where eagle biology meets English-language law.
Tissues & materials
Keratin and integument
Feathers, fur, baleen or skin plates -- tissues, not metals. Moult and wear are the maintenance cycle.
Bone and cartilage
Load paths for stoop, lunge, knuckle-walk or hover. Marrow and pneumatic bone differ by family.
Muscle and tendon
The expensive tissue that speed and intelligence scores only hint at.
Fat, oil and glycogen
Stores that migration, fast and lactation spend. A market for those stores (oil, ivory, fin) is a historical threat.
Keep exploring
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Overall 53