Nature

A climbing goby known as ‘o’opu ‘alamo’o, or Hawaiian freshwater goby. (Hawaii Department of Land and Natural Resources photo)

On the Trails: Fish locomotion

There are about 28,000 species of bony fishes — the largest taxonomic group of vertebrates — and they have been around for a very long… Continue reading

 

A red squirrel pauses on a tree on the University of Alaska Fairbanks campus. (Photo by Ned Rozell)

Alaska Science Forum: The secret life of red squirrels

Stan Boutin has climbed more than 5,000 spruce trees in the last 30 years. He has often returned to the forest floor knowing if a… Continue reading

 

A Banff Snail (Physella johnsoni), about 3.5 millimeters in size, in a hot spring pool. (Paul M.K. Gordon / CC BY-SA 2.5)

On the Trails: Hot spring snails

From a visitor from England who visited Calgary on the way to Juneau, I learned about the Banff Springs snails, which live in thermal springs… Continue reading

 

A male hooded merganser shows off his flashy plumage. (Photo by Bob Armstrong)

On the Trails: Critter watching in fall

I like living in a place where I can encounter wild critters in so many places and so often. But some days are always luckier… Continue reading

A male hooded merganser shows off his flashy plumage. (Photo by Bob Armstrong)
A Boquila trifoliolata in Parque Nacional Puyehue, Chile. (Tony Rebelo / CC BY-SA 4.0)

On the Trails: Mimicry in animals and plants

Mimicry in animals is a common form of protection from predators. For instance, two distasteful or toxic butterflies may mimic each other for mutual defense,… Continue reading

A Boquila trifoliolata in Parque Nacional Puyehue, Chile. (Tony Rebelo / CC BY-SA 4.0)
A short-eared owl pounced on something deep in the grass. (Photo by Greg Chaney)

On the Trails: Owls and voles and other observations

In the middle of October, bird watchers estimated about 40 short-eared owls were seen hunting on the wetlands — probably a record number. What was… Continue reading

A short-eared owl pounced on something deep in the grass. (Photo by Greg Chaney)
Fairbanks’ first real winter storm of October 2024 left behind an uncommon wet, slushy mess. (Photo by Bobby Bianco)

Alaska Science Forum: The numbers behind a weather forecast

A meteorologist from the National Weather Service’s local office recently told a newspaper reporter that heavy, wet, snow would materialize in a few days. He… Continue reading

Fairbanks’ first real winter storm of October 2024 left behind an uncommon wet, slushy mess. (Photo by Bobby Bianco)
Extremes of the colour gradient of the Eastern San Antonio frog (Hyla orientalis). On the left, a specimen captured in Chernobyl inside the high contamination zone; on the right, a specimen captured outside the Exclusion Zone. (Germán Orizaola/Pablo Burraco, republished under a Creative Commons license)

On the Trails: Evolution constantly ongoing among many populations in many places

Someone once asked me “Is evolution still happening?” My brief answer was “Of course, it’s always happening.” I would have gone on to explain a… Continue reading

Extremes of the colour gradient of the Eastern San Antonio frog (Hyla orientalis). On the left, a specimen captured in Chernobyl inside the high contamination zone; on the right, a specimen captured outside the Exclusion Zone. (Germán Orizaola/Pablo Burraco, republished under a Creative Commons license)
A short-tailed weasel pauses at the entrance to a building on the campus of the University of Alaska Fairbanks. (Photo by Ned Rozell)

Alaska Science Forum: Weasels are cute, natural born killers

Weighing as much as a cup of walnuts and resembling a squeaky dog toy, the short-tailed weasel is easy to underestimate. The spunky little creature… Continue reading

A short-tailed weasel pauses at the entrance to a building on the campus of the University of Alaska Fairbanks. (Photo by Ned Rozell)
A crow pulls mussels from a dock piling. (Photo by Jos Bakker)

On the Trails: Crows and their relatives

Crows, jays, ravens, magpies and their various other relatives (nutcrackers, choughs, jackdaws, etc.) belong to the taxonomic family Corvidae. It’s a sizeable family of about… Continue reading

A crow pulls mussels from a dock piling. (Photo by Jos Bakker)
At the end of the season, eyebright flowers (left) adorn the top of the flowering stem. At right, yellow rattle (or rattle pod) has a long flowering season. (Left photo by KM Hocker, right photo by Deana Barajas)

On the Trails: Parasitic and hemiparasitic plants

In our region there are a few fully parasitic plants, totally dependent on other plants for carbon, water, and nutrients. Some of them are not… Continue reading

At the end of the season, eyebright flowers (left) adorn the top of the flowering stem. At right, yellow rattle (or rattle pod) has a long flowering season. (Left photo by KM Hocker, right photo by Deana Barajas)
Spotted tussock moth caterpillars are the local version of woolly bears. (Photo by Bob Armstong)

On the Trails: Woolly bears and spider webs

It’s early fall and we sometimes enjoy seeing fuzzy orange and black caterpillars trekking over the trails on their way to better foraging or a… Continue reading

Spotted tussock moth caterpillars are the local version of woolly bears. (Photo by Bob Armstong)
32 Chunk is competing in this year’s Fat Bear Week, after he made a lot of progress on his salmon-eating goals this summer. (E. Johnston/National Park Service)

Ten years in, Fat Bear Week has drawn millions of viewers to a live webcam in Alaska

Weeklong competition in Katmai National Park culminates Tuesday after delayed start due to a death.

32 Chunk is competing in this year’s Fat Bear Week, after he made a lot of progress on his salmon-eating goals this summer. (E. Johnston/National Park Service)
A male peregrine falcon that hatched in 2023 looks at the biologist who captured him on South Padre Island in Texas in late 2023. (Photo courtesy Padre Island Peregrine Falcon Survey)

Alaska Science Forum: Alaska peregrine falcon numbers drop again

Skip Ambrose has floated the upper Yukon River almost every year since Richard Nixon was President. Back then, in 1973, only 12 pairs of peregrine… Continue reading

A male peregrine falcon that hatched in 2023 looks at the biologist who captured him on South Padre Island in Texas in late 2023. (Photo courtesy Padre Island Peregrine Falcon Survey)
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)