Audubon

Peregrines Make for Better Starling Murmurations

/ Seth Inman / Leave a comment

Image via Audubon.org, by Nick Dunlop

We last mentioned murmurations about three years ago, linking to slideshows from the Guardian that covered European Starlings in the UK. And in our Bird of the Day feature we have shared photos of seven different species of starlings from around Europe and Asia, but somehow none of those species was the European Starling, which is an invasive species in North America (and at least some of Central America as well), but still a good-looking bird.

In this video, there are fantastic moments where the enormous flocks of European Starlings in Napa Valley, California form incredible shapes, largely because they’re being chased by Peregrine Falcons and other raptors.

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Another Addition to the Annals of Dung

/ Seth Inman / Leave a comment

We’ve written about dung before, when it came to beetles rolling it for the poop’s role (ha) in their life cycle, and when it’s been used for recycled paper, and even household cooking gas derived from biodigested manure. Now, we’re learning via Audubon Magazine about another use for the dried doo, and we figured that would be a good time to share about another interesting excremental story from the natural world, which happens to be the fastest moving organism, in a sense.

Both the Black Lark, a bird species found in Europe and western Asia, and the genus of fungi called Pilobolus, more widely distributed around the world, have to deal with something called the Zone of Repugnance when it comes to dung. Although the ornithologists in the Audubon article aren’t quoted using this phrase, it is accepted in mycologist parlance for those who study livestock excrement or something related to it: animals will avoid eating grass or greens in an area where fecal matter is present. Around every pile of poop is a perimeter that the grazers try to not chew on. Black Larks take advantage of that fact to build their nests in no-step zones, and Pilobolus need to shoot their spores behind enemy lines. Matt Soniak, for Audubon:

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Audubon Focuses on Corvids in Latest Issue

/ Organikos / 2 Comments

Corvid Behaviors poster by the Cornell Lab of Ornithology

“Meet the Bird Braniacs,” reads the header for three stories in the March-April issue of Audubon Magazine, highlighting the American Crow, Eurasian Jay, and Common Raven as especially smart species of bird (the three of them are Corvids, or members of the Corvidae family). In the different research projects covered in the Audubon pieces, the idea of empathy in birds is explored by Nicky Clayton at Cambridge University with Eurasian Jays; the problem of deterring Common Ravens from predating upon desert tortoises is a challenge for Tim Shields in the Mojave desert; and the general intelligence of the American Crow is studied by John Marzluff at the University of Washington. All the articles are quite interesting and worth a read online if you have the time. Below, a brief excerpt from the three essays, by Michael Balter, Alisa Opar, and Kat McGowan, respectively:

“I love you!” says Nicky. “I love you!”
“I love you!” says Lisbon.

Nicky Clayton has shoulder-length blonde hair and a posture that reflects her background in dancing.  She is a scientist. She is very smart. Lisbon is a bird, a Eurasian Jay. He’s pretty smart, too. Like most Eurasian Jays, especially the males, Lisbon is also a good mimic. So it’s not clear whether he really loves Nicky, although he certainly likes it when she gives him a worm.

If he loves anyone, it’s probably Rome, his longtime mate. Lisbon and Rome, both eight years old, have been together since they were just two. They share a wired enclosure out here at the edge of Madingley, a peaceful, manicured English village a few miles west of Cambridge.

Clayton, 53, moved to Cambridge University about 16 years ago, around the time when she was becoming an international science superstar for her investigations into avian intelligence. As part of the deal, the university agreed to construct several aviaries at its Madingley annex according to Clayton’s specifications. They’re not fancy, but the birdcages include plenty of space for the captives to fly around, play, and mate, as well as special compartments where they collaborate with Clayton in state-of-the-art bird cognition experiments. Today the aviaries house about 70 birds, including Eurasian Jays, Western Scrub-Jays, and Rooks, all members of the corvid family. At night, the caws and kuks can be heard over much of the village.

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