Migratory birds practiced continental unity long before human nations agreed to it

Evidence

It is an irony of history that the great powers should have discovered the unity of nations at Cairo in 1943. The geese of the world have had that notion for a longer time, and each March they stake their lives on its essential truth. — Aldo Leopold, A Sand County Almanac, 95

By August they have graduated from flying school, and on cool August nights you can hear their whistled signals as they set wing for the pampas, to prove again the age-old unity of the Americas. Hemisphere solidarity is new among statesmen, but not among the feathered navies of the sky. — Aldo Leopold, A Sand County Almanac, 135

Categorization

• XREF: Frames birds’ transnational routes as a natural, pre-human illustration for how policy (like the land ethic) extends community — connects to colonialism and international law threads. — connects to: Migrating geese alter their routes and habits according to local hunting laws — Aldo Leopold, A Sand County Almanac: With Other…, 84; Seasonal territory asserted by migrating birds overrides documented human ownership — Aldo Leopold, A Sand County Almanac: With Other…, 134
• corroborated: 2 independent passages support this claim — Aldo Leopold, A Sand County Almanac: With Other…, 95; Aldo Leopold, A Sand County Almanac: With Other…, 135