The Visual Spectrum Of Birds Includes UV

The Visual Spectrum Of Birds Includes UV
The Visual Spectrum Of Birds Includes UV

The visual spectrum of birds includes UV

“It is now known that many birds, probably most, have some degree of UV vision, which they use to find both food and partners. The berries that some feed on have a UV bloom, and European kestrels can track their vole prey from the UV reflecting off the voles’ urine trails. The plumage (or parts of it) in hummingbirds, European starlings, American goldfinches, and blue grosbeaks reflects UV light, often more markedly in males than females. In certain species, like the blue grosbeak, the degree of UV reflectance may also reflect male quality, though females don’t currently use this aspect of plumage to discriminate between potential partners…”

via: Audubon.org

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Trump Poised to Shrink Two National Monuments

Trump is expected to eliminate nearly 85 percent of Bear Ears National Monument in southeastern Utah, cutting more than 1 million acres from its current boundaries. He’s also set to halve the nearly 1.9-million-acre Grand Staircase-Escalante National Monument (E&E News PM, Nov. 30).

The move is being praised by Republicans who have long argued that the Antiquities Act—the 1906 law that allows presidents to set aside public land—is being used unlawfully to lock up tracts of federal land. On the other side, Democratic allies have vowed to take any monument reductions to court.

Scientists who have studied the region, especially Grand Staircase-Escalante National Monument, say redrawing its boundaries could be detrimental to scientific research and discoveries.

“The monument has been demonstrably a very, very important scientific laboratory to learning and understanding on many realms,” said Mike Scott, a retired U.S. Geological Survey researcher.

Scott and his colleagues have spent time in Grand Staircase-Escalante studying how different management policies and activities on rangelands—there are many different kinds across the ecologically diverse monument—affect the health of those ecosystems. Rangeland activities include anything from how grazing affects soil quality to the health of different soil types.

As climate change brings warmer, drier conditions, understanding how to keep soils and grassland ecosystems healthy in arid landscapes is crucial to avoid desertification, Scott said. Grand Staircase-Escalante has been “a really critical living laboratory,” he said.

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Black Opal - Lightning Ridge, Australia

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Xpand Your Horizons

Xpand Your Horizons is a growing online community that shares videos and other material aimed to intrigue people to think outside the box and expand the interest all around. The Xpand Your Horizons Family is sometimes shortened to "XYH" or "XYHor" here on Tumblr in our many secondary and more specific blogs. Our Family has compiled more than 60 playlists on YouTube now and has viewed every video to make sure that what is delivered is factual. If something appears questionable or the comment feedback alludes to mistakes, research is done and it is determined whether or not it's worth sharing. As of late, it is so easy to come across videos containing little to no actual research or are so heavily boggled down with opinions that you can find yourself in a battle of so-called "whits" on the internet. The Xpand Your Horizons Family doesn’t yet upload or produce any original content...yet... but we would like to make it known that We’re sharing all this contentbecause it's important to take Science seriously in a healthy and safe environment. Each playlist can be found on YouTube under the Xpand Your Horizons moniker and their specific topic(s) is/are displayed in the title, and further explanation is in their descriptions. Not all are academic inclined, some deal with pop culture as well as media. Enjoy!For more content, Click Here and experience this XYHor in its entirety!

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