2022 Pika Patrol, Part Two

My husband and I went up to our second pika site, this one on Halfmoon Creek above Leadville, Colorado, last week, looking for the little rabbit-relatives.

If you recall, last year we unexpectedly had to walk an extra six miles to the site and back due to a Forest Service road closure. This year, the road was open and we were able to drive much closer. So that was one obstacle down.

After last year’s death march, the hike up was a breeze. Beautiful day, great company.

Looking south as we climb the last slope to the pika site.

But after scrambling around on the unstable talus slopes for half an hour, we found no sign that pika were living in the scree field this year — no sightings, no chirps, no new scat, no new urine markings.

An old pika den, empty this year.

My husband and I, frustrated wildlife biologist wannabes that we are, thought a lot about why there were no pika this year. What we came up with was that this site is no longer good pika habitat.

At it’s most basic, good habitat is made up of a place where animals can get the food and other things they need while being safe from predators or other threats like the cold. The Halfmoon Creek site has scree that would protect the pika in the bitter winter cold. But we think that there were too many big trees surrounding the site — it is just a football field on a steep, unstable slope, surrounded by trees. The big trees did two things — 1) blocked the sun preventing grass and other forage from growing and 2) provided cover for hawks, weasels and coyotes to sneak up on the pika, working their way close enough to catch the little critters.

My husband holding a card with a “W” for West. But no matter what direction you look, there are trees a stone’s throw away.

The lack of pika was very disappointing, although not unexpected. In the three years we’ve been to this site, we’ve seen one pika, and a little more sign.

Years ago there were enough pika to set up monitoring at Halfmoon Creek, but warmer summer temperatures from climate change may be letting the trees survive. Now the trees are too big, and the pika are essentially gone.

We bushwacked our way back down, this time crossing over into the avalanche track just to the east. A couple of years ago, I talked about the intense power of the avalanche, so I won’t go into it too much here. But it was nice to see some of the plants that grew in the open space the avalanche had made.

Fireweed, Epilobeum angustifolium

This is fireweed, common to subalpine communities all over North America, and indeed around the world. There are a few plants who’s scientific names I really enjoy saying, and this is one — Epilobium angustifolium — EP i LOB ium ANGUST i FOLIUM. Just rolls right off my tongue. And you wonder why I call myself a science geek.

The four petals and the long stamen (long thing coming out of the flower to spread into an X) are characteristics of the Evening Primrose family.

Fireweed shares the Evening Primrose family with domesticated fuchsia plants. As it’s name suggests, it comes up in disturbed areas, like where there has been a fire, or in our case, an avalanche.

We scrabbled our way across the slope when I saw some small blue berries nestled in among red leaves.

Vaccinium ceaspitosa plants at 11,000 feet.

I looked closer and saw to my delight that they were indeed blueberries! We do have native blueberries in Colorado, but obviously you have to be fairly determined to see them.

Close-up of high altitude blueberries.

The coolest part about finding the blueberries was that when I got down on my belly to get this photograph, they smelled like blueberries.

All I could think of was the number of animals that were going to really enjoy these — jays, raccoons, bears …

I got up and did quick check to see that no hungry ursines were about to make a lunch of me. Instead, we started down the slope.

As we stumbled back down, my husband pointed to a line of rocks that edged the open area we were crossing.

The rocks start in the lower left corner and follow the willows up until it gets a little steeper.

These rocks were picked up by the avalanche when it started on the slope above, and carried along as the snow roared down. On the lower slope, the avalanche slowed, and the rocks dropped out along the sides.

There is always something new to see in the high country, even if it isn’t exactly what you started out to find.

Love it.

Avoid avalanches, be aware of bears, and stay happy.

Published by Amy Law

Amy Law is a science geek. She feels about science the way some people feel about music, or art, or sports – a total and complete emotional connection. She thinks in science. For Amy, there’s nothing better than helping people see the beauty of science as she does. She loves to untangle a complicated subject into its parts, explaining it so that anybody can understand what’s happening. Let her show you her world...

3 thoughts on “2022 Pika Patrol, Part Two

  1. Thank you for taking us along on Pika Patrol, Amy. I’m sorry you didn’t see any, but am fascinated by your theories as to why they’re no longer in that area. Good thinking! I’m glad you got to see fireweed, though. Fireweed makes every hike a better hike.

    Like

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: