Every hummingbird 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 tiny fuselage, a long bill and a shoulder joint that lets the wing invert. Pectoralis and supracoracoideus are both huge for the upstroke’s lift.
Feeding apparatus
Nectar sugars plus insect protein. Hovering is among the costliest vertebrate gaits; torpor is the nightly rebate. 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 hummingbird energy budget -- dive, hover, sprint or bulk browse -- not to a generic vertebrate template.
Senses and neural control
Colour vision into the near-ultraviolet helps flower finding. Spatial memory of traplines is the cognitive load.
Reproduction and ontogeny
Replacement rate is the hidden resilience number. Gram-scale fat stores and weather windows bound migration. Island endemics have nowhere to shift when scrub is cleared.
Thermoregulation and salt/water
Climate and osmoregulation bound where a hummingbird 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
Colour vision into the near-ultraviolet helps flower finding. Spatial memory of traplines is the cognitive load.
Human interface
Hunt, tourism, film or quota -- the surface where hummingbird 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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