Nature

A young bleeding tooth mushroom sheds excess water in red drops. (Photo by Bob Armstrong)

On the Trails: Birds, leaves and mushrooms at the onset of autumn

On a dark and dismal day in late September, I cheered myself up by remembering some pleasing observations in recent weeks: • On the dike… Continue reading

A young bleeding tooth mushroom sheds excess water in red drops. (Photo by Bob Armstrong)
Being tired from a hike is far different than the type of tired that comes with a newborn baby. (Photo by Jeff Lund)

I Went to the Woods: Discovering how being tired as a new parent is life-giving

“I’m so tired.” I had no idea how to reply. As a basketball coach you tell players to push through. As a high school teacher… Continue reading

Being tired from a hike is far different than the type of tired that comes with a newborn baby. (Photo by Jeff Lund)
Amanita mushrooms are large, white-spotted, and usually red. (Photo by Bob Armstrong)

On the Trails: Marvellous fungi

People often think of fungi as dietary items or as agents of rot and decay. Fair enough, but those are only two small windows into… Continue reading

Amanita mushrooms are large, white-spotted, and usually red. (Photo by Bob Armstrong)
A wood frog pauses in the forest just off the Yukon River near the mouth of the Nation River. (Photo by Ned Rozell)

Alaska Science Forum: Wood frogs — farthest north amphibian cannibals

Their staccato voices can make a muskeg bog as loud as a city street, though most are so small they could sit in a coffee… Continue reading

A wood frog pauses in the forest just off the Yukon River near the mouth of the Nation River. (Photo by Ned Rozell)
The South Sawyer glacier had shed many small bergs, which were occupied by hard-to-see resting seals. (Photo by Mary F. Willson)

On the Trails: Excursions at the end of summer

In late August I went on a day cruise to Tracy Arm. The weather was good for observing: gray, overcast skies to reduce the glare… Continue reading

The South Sawyer glacier had shed many small bergs, which were occupied by hard-to-see resting seals. (Photo by Mary F. Willson)
Eyebright flowers occur in abundance along local trails. (Photo by Denise Carroll)

On the Trails: Trailside flowers

On a gray morning in early September, with no cruise ships in town(!), I wandered up Basin Road and the first part of the Perseverance… Continue reading

Eyebright flowers occur in abundance along local trails. (Photo by Denise Carroll)
Florida State University graduate student Tyler Hunt scans a rock that contains several dinosaur footprints during a recent trip on the upper Colville River. (Patrick Druckenmiller, UA Museum of the North)

Alaska Science Forum: The lost world of northern dinosaurs

On a recent river trip in northern Alaska, scientists from the University of Alaska Museum of the North found a lost world, a time of… Continue reading

Florida State University graduate student Tyler Hunt scans a rock that contains several dinosaur footprints during a recent trip on the upper Colville River. (Patrick Druckenmiller, UA Museum of the North)
A willow rose develops in late summer. (Photo by Mary F. Willson)

On the Trails: Bird activity, willow roses

I haven’t seen much bird activity along my mid-August trails recently, but here at home there is always something going on. The suet block, seed… Continue reading

A willow rose develops in late summer. (Photo by Mary F. Willson)
A medium-sized chiton commonly known as black katy can sometimes reach a length of 12 centimeters. (Photo by Bob Armstrong)

On the Trails: A diversity of eyes

This essay was launched by reading an almost unintelligible (to me) scientific paper about chiton eyes. Nevertheless, that paper led to others, and here I… Continue reading

A medium-sized chiton commonly known as black katy can sometimes reach a length of 12 centimeters. (Photo by Bob Armstrong)
Phillip Wilson (blue jacket) and Dan Mann stand on a rock outcrop that was scoured by floodwaters a few centuries ago when Black Rapids Glacier — far in the distance — advanced to dam the Delta River. (Photo by Ned Rozell)

Alaska Science Forum: The galloping glacier’s recent dramas

LACK RAPIDS OF THE DELTA RIVER — If we climb high enough above this tumble of gray water, we can see a wedge of blue-white… Continue reading

Phillip Wilson (blue jacket) and Dan Mann stand on a rock outcrop that was scoured by floodwaters a few centuries ago when Black Rapids Glacier — far in the distance — advanced to dam the Delta River. (Photo by Ned Rozell)
Red elderberry is toxic to humans, but birds consume the fruits readily. (Photo by Bob Armstrong)

On the Trails: Late summer fruits — lots of questions

Mid-August and the berry crops of wild currants are ripe. The stink currant (reportedly so-called for the smell of crushed leaves) sometimes bears large crops… Continue reading

Red elderberry is toxic to humans, but birds consume the fruits readily. (Photo by Bob Armstrong)
A piece of obsidian rock sits on display in the Smithsonian Institution in Washington, D.C. William Healey Dall collected the rock in 1868 near the Nowitna River in Interior Alaska. (Photo by Jeff Rasic)

Alaska Science Forum: The recent history of a black rock

In June of 1867 — a few months before Alaska would become part of the United States with the transfer of $7.2 million to Russia… Continue reading

A piece of obsidian rock sits on display in the Smithsonian Institution in Washington, D.C. William Healey Dall collected the rock in 1868 near the Nowitna River in Interior Alaska. (Photo by Jeff Rasic)
Recently emerged toadlets still have their tadpole tails. (Photo by Bob Armstrong).

On the Trails: Visiting Gustavus and Glacier Bay

I hadn’t been over there for several years, and it was time to refresh some old memories of forest walks and boat or kayak trips… Continue reading

Recently emerged toadlets still have their tadpole tails. (Photo by Bob Armstrong).
A creek runs beside the Mesa Site in northern Alaska. (Photo by Dan Gullickson)

Alaska Science Forum: Pondering the mystery of the Mesa people

Now as quiet as wind whispering through grass, a plateau rising from the flats of northern Alaska was for thousands of years a lookout for… Continue reading

A creek runs beside the Mesa Site in northern Alaska. (Photo by Dan Gullickson)
Western rust fungus can leave a big gnarly lump on pine branches. (Photo by Mary F. Willson)

On the Trails: Flowers, caterpillars and tree foam

Light rain fell as I left the Valley but, as usual, it fell more heavily as I neared the downtown area. Fog lay thick over… Continue reading

Western rust fungus can leave a big gnarly lump on pine branches. (Photo by Mary F. Willson)
A red ant stimulates aphid to produce honeydew. (Photo by Bob Armstrong)

On the Trails: Ants are busy critters

There are more than 20,000 species of ants, including such noticables as picnic ants, sidewalk ants, carpenter ants, and so on. Less noted by most… Continue reading

A red ant stimulates aphid to produce honeydew. (Photo by Bob Armstrong)
A male sockeye salmon makes its way upstream. (Photo by Bob Armstrong)

On the Trails: Life history patterns

Most organisms have one of two basic, genetically programmed life histories. Some can (potentially) reproduce several times during their lives; they are said to be… Continue reading

A male sockeye salmon makes its way upstream. (Photo by Bob Armstrong)
A common aerial wasp forages on cow parsnip flowers. (Photo by Bob Armstrong)

On the Trails: Cow parsnip flowers

Cow parsnip is known in our field guides as Heracleum lanatum, although it sometimes has other names. The flowers are typically displayed in big, flattish… Continue reading

A common aerial wasp forages on cow parsnip flowers. (Photo by Bob Armstrong)
A roadside daisy displays a fasciated center. (Photo by Deana Barajas)

On the Trails: An odd plant malady, a clever duck, and more

I recently learned about a mysterious, relatively rare affliction of plants called “fasciation.” A fireweed plant at the Point Bridget trailhead had not developed the… Continue reading

A roadside daisy displays a fasciated center. (Photo by Deana Barajas)
A bumblebee pollinates the flower of shy maiden, which will turn upward soon afterward. (Photo by Bob Armstrong)

On the Trails: Flowers, showy and otherwise

The spring and summer flower show at Cowee Meadows (way out on the Point Bridget Trail) is always a treat, and the broad uplift meadows… Continue reading

A bumblebee pollinates the flower of shy maiden, which will turn upward soon afterward. (Photo by Bob Armstrong)