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I find it amazing that, when they depart on autumn migration, juvenile waders can be faced with a journey of hundreds or thousands of kilometres. In the latest phase of their Oystercatcher studies in Iceland, Verónica Méndez and colleagues have been tagging young birds, just at the point that they can fly, to try to … Continue reading A young Oystercatcher’s first adventure
There is something pleasing about four wader eggs in a nest. They seem to fit so neatly, with their pointed ends in the middle, as illiustrated in the Ringed Plover nest alongside. There has been an assumption that this is an optimum arrangement for incubation, with strong selection to lay a maximum of four eggs. … Continue reading Four eggs or five?
A 2026 paper in Animal Behaviour examines how quickly juvenile Black-tailed Godwits(right, with juvenile Redshanks) acquire the feeding skills they will need to get them through their first winter. Josh Nightingale followed the same migration route taken by young birds, as they travelled south from Iceland, and measured their intake rates. How long did it … Continue reading Learning from their elders
The lowlands of Iceland are changing. Low-intensity farming is becoming economically challenging and marginal grazing land is increasingly being used for forestry, to provide summer cottages for city-dwelling Icelanders, for electricity generation and to expand tourist infrastructure. All of these developments require increased access to semi-natural areas with internationally important populations of ground-nesting birds. How … Continue reading Roads too! Another problem for Iceland’s waders
Autumn moult is an important part of the annual cycle of migratory shorebirds, typically squeezed in between chick-rearing and the onset of winter. The process of changing an individual’s feathers lasts as long as the whole of the breeding season but is far well less well studied. If a bird starts moulting too late or … Continue reading Moult, captured on camera
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I am teaching a fun, 6-week, non-credit course on the search for intelligent life among the stars, offered (by zoom or in person) through the San Francisco State University Osher Lifelong Learning Institute, starting Sept. 30. It’s part of a program of courses for retired people, so if you are younger, perhaps you can pass […] The post A Course on Aliens in Science & Science Fiction for People Over 50 appeared first on Andrew Fraknoi - Astronomy Lectures - Astronomy Education Resources.
How do you tell friend from foe in a split second? These beautifully designed WWII guides used silhouettes and vehicle details into a system for recognizing tanks, planes, and ships on sight.
Regular readers may recall that I put a visit to Tulainyo Lake on my bucket list a few years ago. Last week I did it. Impossibly remote, otherworldly beauty, and an enduring mystery. Just how deep was this lake? Wikipedia claims not to know. Measuring it is non-trivial. A worthy challenge. The skinny: This relatively small alpine lake is about 117 m deep! That makes it the 25th deepest natural lake in North America, and by far the deepest lake on Earth for its size. Enjoy our interactive report here.