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Saturday, January 22, 2011 - Bosque Birdwatchers RV Park, San Antonio NM

Foraging, Sandhill Cranes, Bosque del Apache National Wildlife Refuge, San Antonio NM, January 17, 2011
Foraging, Sandhill Cranes, Bosque del Apache National Wildlife Refuge, San Antonio NM, January 17, 2011

What do cranes eat anyway?

From what I can see, here they seem to be eating corn, which is grown for them, and the tubers of marsh grasses. You can't see it but this grassy meadow is flooded with a couple of inches of water. This area extends "upstream" from the shallow pond where the cranes roost. Pumps are running, pumping water into the upper end of this long meadow whence it flows slowly down through the grasses to the pond. Makes for good foraging and photographing.

Sandhill Cranes forage by picking and probing with their long bills both at and below the water’s surface, as well as on land. They prefer grain when available, but eat a wide variety of foods. In their northern breeding areas, they consume berries, mammals, and insects. Where resident year-round, Sandhill Cranes eat insects, reptiles, amphibians, small birds and mammals, seeds, and berries. Source: Cornell Laboratory of Ornithology.

Night camp

Site 10 - Bosque Bird Watcher's RV Park, San Antonio NM

Genetic Determinism and Human Nature

The "implication" that seems to worry people the most is so-called genetic determinism - the notion that if human nature was shaped by evolution, then it's fixed and we're simply stuck with it; there's nothing we can do about it. We can never change the world to be the way we want; we can never institute fairer societies - policy-making and politics are pointless.

Now, that's a complete misunderstanding. It doesn't distinguish between human nature - our evolved psychology - and the behavior that results from it. Certainly, human nature is fixed. It's universal and unchanging, common to every baby that's born, down through the history of our species.But human behavior, which is generated by that nature, is endlessly variable and diverse. After all, fixed rules can give rise to an inexhaustible range of outcomes. Natural selection equipped us with the fixed rules - the rules that constitute our human nature. And it designed those rules to generate behavior that's sensitive to the environment. So the answer to genetic determinism is simple. If you want to change behavior, just change the environment.

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