Understanding the human body is a team effort. That's where the Yachtel group comes in.

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This is Scientific Americans' 60-second science. I'm Jason Goldman. Got a minute?

When birds face the destruction of their habitat, some species don't make it, while others survive.

But what happens at the very beginning of the process, just as the bird's habitat starts to change?

Research in Argentina's Monte Desert has provided some answers. Protected parts

of the desert have lots of plant diversity, trees, tall shrubs, short shrubs, grasses, and flowering

plants. With so many options, most seed-eating birds choose to focus on large grass seeds. The birds

can get all the energy and nutrients they need

with minimal effort. But when cattle show up to graze the desert's natural landscape,

birds face changes in food availability. Some birds are happy to change their diets in response,

but others not so much. And it's the ones set in their ways that are at the highest risk.

Understanding how

birds react to grazing can help conservationists figure out how to help those species most in jeopardy.

Ecologists from the Argentine-arid Zones Research Institute compared soil samples from the desert's

Nyakunian Biosphere Reserve to samples from two neighboring cattle ranches. They discovered that grass seeds, the desert's Nyakunian biosphere reserve to samples from two neighboring cattle

ranches. They discovered that grass seeds, the birds' favorites, were just one quarter as likely

to be found in the ranches compared with the reserve. Next, they captured birds and flushed their

digestive tracts to see what they were eating. The common de Yucca finch and the Rufus-colored sparrow had adjusted

...