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This photo available under a Creative Commons license shows a hooded pitohui (Pitohui dichrous) YUS Conservation area on the Huon Peninsula, Morobe Province, Papua New Guinea. (Courtesy Photo / Wikimedia)

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On the Trails: Toxic birds and bugs

These chemical compounds are often derived from plants

Killdeer chicks have just one black breast band at first, but soon get the characteristic two bands.(Courtesy Photo / Bob Armstrong)

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On the Tails: Shorebirds in winter

Sightings are no “shore” thing.

Vladimir Alexeev in Norway while teaching summer school in 2017. Alexeev is a climate scientist who recently worked with local composer Michael Bucy to create a song about climate change. (Courtesy photo/Vishnu Nandan)

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Sounding a warning

Local composer writes song about climate change

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Alaska Science Forum: Fun with ice physics in the cryosphere

Here’s why some found recent winter weather fascinating.

A gull looks for dislodged food in the surf. (Courtesy Photo / Bob Armstrong)

Sports

On the Trails: Surf, bird food and paralytic shellfish poisoning

Surf’s up!

This photo shows a glacier bear walking along rocky terrain. There are four known populations of black bears in Southeast Alaska that include the lighter-colored bears, said Tania Lewis, a wildlife biologist for the National Park Service at Glacier Bay National Park and Preserve. (Courtesy Photo / Tom Hausler)

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Recessive genes and receding glaciers: Lecture focuses on Southeast’s blue bears

Biologist shares insights about glacier bears.

Ned Rozell holds a shard of ice crust, one-inch thick, that lurks in the middle of the Fairbanks snowpack. (Courtesy Photo / Kristen Rozell)

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Midwinter rain-on-snow a game changer

A few hours of a December day may affect living things for years to come in the middle…

The Valley of 10,000 Smokes buried in ash a century after the Novarupta eruption. (Courtesy Photo / Chris Miller)

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Pride of Bristol Bay: Novarupta — The Greatest Volcano Eruption of the 20th Century

On June 6, 1912, all hell broke loose.

This photo shows a ptarmigan in snow. (Courtesy Photo / Denise Carroll)

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On the Trails: Strolling on the snow

Snow, and more snow!

This photo shows a porcupine near Valdez. (Courtesy Photo / Ned Rozell)

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Alaska Science Forum: The porcupine’s winter in slow-motion

How do porcupines survive winter? A lengthy study provides insights.

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Sustainable Alaska: Humans vs. Volcanoes

We are warming the world tens of times faster than did the ancient volcanoes.

A kingfisher’s diving sequence: a headfirst plunge with wings folded, splash, airborne again. (Courtesy Photo / Bob Armstrong)

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On the Trails: Diving into birds underwater

There’s a lot going on under the surface.

Ellesmere Island National Park in Canada. (Courtesy Photo / Joel Barker)

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Alaska Science Forum: Mummified forest tells tale of changing north

Ancient fair-weather trees suggest a very warm period in the far north

This July 13 photo shows a short-tailed weasel. Short-tailed weasels or ermines wear brown summer coats but white coats in winter. The animals are among the dozens of species that make up the family Mustelidae. The long, slender body form of weasels is well-suited for these predators to pursue voles and mice into narrow tunnels and tight spaces. (Courtesy Photo / Kerry Howard)

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On the Trails: The weasel family

Flexing our mustelids.

Voles left several trackways at the edge of the wetlands; a tail-drag mark shows behind the foot marks. (Courtesy Photo / David Bergeson)

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On the Trails: Observations from four wintry walks

Plenty of creatures stirring.

A graphic shows warming of the Arctic compared to the rest of the world. The image was released as part of NOAA’s Arctic Report Card for 2021 at the American Geophysical Union Fall Meeting in New Orleans, Dec. 14, 2021. (Courtesy Image / NOAA climate.gov)

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Alaska Science Forum: News of the Arctic from New Orleans

We need to talk about this report card.

This photo available under the Creative Commons license shows a New Mexico whiptail. The lizards are obligately parthenogenetic(capable of reproduction without fertilization) and unisexual (female). (Courtesy Photo / Greg Schechter)

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On the Trails: Parthenogenesis in vertebrates

There’s another way to be a single parent.

A forest growing on Malaspina Glacier in southern Alaska. (Courtesy Photo / Martin Truffer)

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Alaska Science Forum: Elephant Point and trees growing on ice

Pointing out the origins of a name.

This photo shows a raven in the snow. (Courtesy Photo / Kerry Howard)

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On the Trails: Transition to winter — maybe

A mat of old leaves lined the roadway, each leaf fringed with crystals, making a pretty mosaic…

The egg mass under the tipped up shell is indicated by A, and the head of the male sculpin by B. (Courtesy Photo / John Palmes)

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On the Trails: Caring for offspring

Vertebrates have a broad spectrum of ways to care for their offspring