Nature

Close up view of an adult male mountain goat in late-winter, near Juneau Icefield, Alaska. In the background, steep avalanche prone slopes are visible. (Photo by Kevin White)

Avalanche lessons from mountain goats: A study of ‘Life on the Edge’

Wildlife biologist Kevin White shared the relationship between mountain goats and avalanches.

 

Young female spruce cones grow upright and bend down to open when the seeds are ripe and ready to disperse. (Photo by Mary Willson/courtesy)

On the Trails: Fledgling birds and spruce tips

The stroll was peaceful and the birds were singing.

 

A Pelagic cormorant in flight. (Michael L. Baird / CC BY 2.0 photo)

On The Trails: A change of scene

By Mary F. Willson

 

Four adult female mountain goats climb in mid-winter through snow and ice covered cliffs on the Takshanuk Ridge in Haines, Alaska. (Photo courtesy of Kevin White)

Avalanches impact mountain goat populations

Mountain goats seek safety from predators in steep terrain, but they are not immune to winter dangers.

Four adult female mountain goats climb in mid-winter through snow and ice covered cliffs on the Takshanuk Ridge in Haines, Alaska. (Photo courtesy of Kevin White)
Male wood ducks have colorful plumage and do not share parental duties. (Photo courtesy of Kerry Howard)

On the Trails: Wood ducks

Wood ducks nest seasonally in forested areas across North America from coast to coast in southern Canada and the northern tier of states. From southern… Continue reading

Male wood ducks have colorful plumage and do not share parental duties. (Photo courtesy of Kerry Howard)
A yellow-rumped warbler. (Photo by Helen Unruh)

On the Trails: Yellow-rumped warblers and other observations

My peanut butter feeder draws a nice assortment of visitors, including chickadees, nuthatches, siskins, juncos, a hairy woodpecker, and a squirrel. Most of these also… Continue reading

A yellow-rumped warbler. (Photo by Helen Unruh)
A violet-green swallow in flight. (Photo by Bob Armstrong)

On the Trails: Violet-green swallows; shoveler ducks

In early May, one of my great pleasures was watching violet-green swallows in their fast, circular flights over water (e.g., the river, Kingfisher Pond). They’d… Continue reading

A violet-green swallow in flight. (Photo by Bob Armstrong)
A beach marmot alongside the trail seems to pose for its photograph. (Photo by Helen Unruh)

On the Trails: Spring??

The calendar says it is spring and maybe it is here. But several Juneau folks have mentioned that this is the worst spring in their… Continue reading

A beach marmot alongside the trail seems to pose for its photograph. (Photo by Helen Unruh)
Western toads are terrestrial except during the spring mating season. (Photo by Deana Barajas)

On The Trails: Spring birds and toads

In late April, a male yellow-rumped warbler began coming regularly to my deck, visiting the feeders. He picks off mouthfuls of peanut butter, one after… Continue reading

Western toads are terrestrial except during the spring mating season. (Photo by Deana Barajas)
Freshwater bryozoans in Auke Lake make gelatinous round colonies. (Photo by KM Hocker)

On The Trails: Bryozoa

Sometime in April, a friend alerted me to some odd ball-shaped structures attached to a spruce log in Auke Lake. These are bryozoans, a type… Continue reading

Freshwater bryozoans in Auke Lake make gelatinous round colonies. (Photo by KM Hocker)
Golden-crowned sparrows come through town on their way to alpine nesting areas. (Photo by Bob Armstrong)

On The Trails: Spring arrives

Spring is happening, very slowly but surely. Purple mountain saxifrage has been blooming, salmonberry flowers appear, yellow violets are starting to flower. However, I have… Continue reading

Golden-crowned sparrows come through town on their way to alpine nesting areas. (Photo by Bob Armstrong)
It’s tough to beat a campfire after a day of steelhead fishing. (Photo by Jeff Lund)

I Went to the Woods: No need to go pro

The coolness with which I lunged for the fish, missed, gathered myself, swept the rod back, lunged again and netted the steelhead was inspiring. I… Continue reading

It’s tough to beat a campfire after a day of steelhead fishing. (Photo by Jeff Lund)
A male belted kingfisher perches to inspect the water below. (Photo by Jos Bakker)

On The Trails: Kingfishers

Kingfishers have captured the fancy of people for centuries. In Greek mythology, the gods caused a man to drown, leaving his lover, a woman named… Continue reading

A male belted kingfisher perches to inspect the water below. (Photo by Jos Bakker)
The steamboat Yukon travels the Yukon River. (Public domain photo)

Alaska Science Forum: An early ascent of the Yukon River

Civil War veteran Charles Raymond was 27 when he accepted an assignment to visit the new U.S. territory of Alaska, a place so far away… Continue reading

The steamboat Yukon travels the Yukon River. (Public domain photo)
A queen bumblebee visits a blueberry flower. (Photo by Bob Armstrong)

On The Trails: Spring flowers and their pollinators

Spring flowers have co-evolved with insect pollinators for a long time. The flowers require pollen delivery to set seed. To entice insects to visit and… Continue reading

A queen bumblebee visits a blueberry flower. (Photo by Bob Armstrong)
A male red-winged blackbird shows off his colors in a good display. (Photo by Gina Vose)

On the Trails: Springtime

The last part of March seemed to pass slowly, at least for those of use impatient for spring. Each of us has their own sequence… Continue reading

A male red-winged blackbird shows off his colors in a good display. (Photo by Gina Vose)
A pseudoscorpion contemplates a red mite for lunch. (Photo by Bob Armstrong)

On The Trails: Pseudoscorpions

Just before the spring equinox, a friend and I went out on the Fish Creek Trail one morning on a low tide. We saw five… Continue reading

A pseudoscorpion contemplates a red mite for lunch. (Photo by Bob Armstrong)
(Illustration by Stephanie Harold)

Woven Peoples and Place: Seals, science and sustenance

Xunaa (Hoonah) necropsy involves hunters and students

(Illustration by Stephanie Harold)
A red-winged blackbird male shows off his colorful “epaulets.” (Photo by Bob Armstrong)

On the Trails: Spring comes slowly

February ground to a halt and March slowly geared up. Days were getting longer, but the tedious pseudo-spring weather prevailed — no longer really winter… Continue reading

A red-winged blackbird male shows off his colorful “epaulets.” (Photo by Bob Armstrong)
A male peacock showing off its colors. (Jatin Sindhu / CC BY-SA 4.0)

On the Trails: Three observations to ponder

While we are waiting (?patiently?) for spring to really get rolling, here are a few things to think about. • Sexual dimorphism in bird plumage:… Continue reading

A male peacock showing off its colors. (Jatin Sindhu / CC BY-SA 4.0)