Built for lift.
Lightweight, air-filled skeletal structures and a large respiratory air-sac system support long, narrow wings. Thermal lift, rising air and atmospheric currents carry it through extended glides. Strong wingbeats serve take-off and manoeuvring; continuous powered flapping is uncommon.
An unresolved aerial contact.
Its size, body heat and wing movement can register on military surveillance systems before there is enough data to identify an animal. A Greifensegler may briefly appear as a potential threat contact until further sensor data resolves its biological flight pattern.
It normally avoids machines and dense human activity. Close encounters can still be dangerous because of its size, especially if it is injured, cornered or defending offspring.
Diet
An opportunistic predator and scavenger, feeding on smaller aerial fauna, terrestrial animals it can safely seize, and carrion. It does not normally regard humans as prey.
Reproduction
Egg-laying, with one or two large eggs in a normal clutch. Young develop slowly and require extended parental protection before becoming fully independent flyers.
Ecological role
An upper-level predator and scavenger that helps regulate populations of smaller fauna and removes exposed carrion.