- Frost and Ice shows some of my favorite images of frost and ice taken over the years. I especially enjoy capturing creatures in the scene.
- Of interest is the numerous places and ways in which we see frost, ice crystals and just ice appear.
- One site that discusses this in easy to understand terms is https://www.mnn.com/earth-matters/climate-weather/stories/7-strange-ice-...
- And also on Wikipedia https://en.wikipedia.org/wiki/Frost
- This article by Mary Willson discusses one of the processes https://onthetrailsjuneau.wordpress.com/2017/04/05/january-ice-and-snow/
- The article Mary mentioned can be seen here /sites/default/files/Hair%20Ice%20and%20Fungus.pdf
These videos are free to use for educational purposes. To download them click on vimeo on the bottom right. To view them full screen click on the symbol next to the HD at the bottom. The bullets can be copied and pasted into a word document.
- Beavers putting Mud and Sticks on their Lodge includes photos and video clips taken over several years.
- I have been amazed by how active they can be during the hours of darkness. Both beavers never stopped for about 7 hours from sunset to sunrise bringing mud to pack on their lodge.
- To learn about the beavers in the Mendenhall Glacier area in Juneau look at this book Beavers by the Mendenhall Glacier in Juneau, Alaska
- For a really fun and great place to see beavers in their lodge look at https://www.youtube.com/watch?v=xvNa6yqMuoM Live Streaming of wild beavers in their home or lodge, Mendenhall Glacier, Tongass National Forest in Juneau, Alaska. Video is captured by infrared camera
- Flatfishes are some video clips I have taken over the years in saltwater in the Juneau area.
- Of interest is how they change their appearance to resemble their environment.
- In one of the clips you can see a Sturgeon Poacher following a flatfish.
- For interesting information about these fascinating fish look at https://www.pbs.org/wgbh/nova/article/flatfish-evolution/
- The species of flatfish that occur in Alaska and their identification can be found in Field Guide to the Nearshore Marine Fishes of Alaska by S.W. Johnson, A.D. Neff, and M.R. Lindeberg
- Inside a Beavers Lodge shows beavers grooming, working on their bed, and sleeping.
- Of special interest is the beaver cutting slices off sticks that appear to be for the purpose of making bedding material. I have seen then bringing in grass for bedding but never this type of behavior. I read a general account of this behavior which indicated it was the female preparing a bed for her kits. The beaver doing this is the lighter colored of the two so perhaps it is the female.
- Watch carefully and you can eventually see two Daddy Longlegs in the Lodge.
- A mink frequently comes into the lodge to look around. Last year the beaver cam showed a mink bringing a fish into the lodge and eating it.
- The Wild Beaver Cam at a beaver lodge in the Mendenhall Glacier area is fascinating to look at https://www.youtube.com/watch?v=xvNa6yqMuoM
- A Marten arrives and shows an American Marten near the Mendenhall Glacier in Juneau, Alaska. The last photo in the video was taken on Admiralty Island so it is probably a Pacific Marten.
- For information on martens look at /sites/default/files/American%20Marten%20.pdf
- For information about them in Alaska look at http://www.adfg.alaska.gov/index.cfm?adfg=americanmarten.main
- Eats its Poop shows a beaver inside its lodge eating its fecal matter.
- Beavers deal with cellulose in several ways. Attached to the digestive tract, near the junction of the small and large intestines, is a large pouch, called the cecum. It is filled with bacteria that break down cellulose into smaller, more usable molecules. This material is excreted as a special kind of feces, which is dark and soft. Beavers eat this material, passing it through the gut a second time and extracting more of the nutrients and vitamins. Beavers share with rabbits and some other small plant-eaters this curious habit of eating the products of cecal digestion. Digested material that has not been processed by the cecum is lighter and firmer; it is excreted but not eaten.
- The above is from Beavers by the Mendenhall Glacier in Juneau, Alaska
- This habit of eating their fecal matter is called "caecotrophy."
- Two Murrelets in Alaska shows the Marbled Murrelet and the Kittlitz's Murrelet with their calls.
- The Kittlitz's Murrelet has been declining in Alaska one report that discusses this Fatal Paralytic Shellfish Poisoning in Kittlitz's Murrelet (Brachyramphus brevirostris) Nestlings, Alaska
- Another report that studies the effects of vessel traffic on them is Effects of Vessel Activity on the NeaNeaNear-shore Ecology of Kittlitz’s Murrelets (Brachyramphus brevirostris)
in Glacier Bay, Alaskaka
- Harbor Seal Behavior is from a Alaska Wildlife Alliance meeting where I gave a power point presentation about their behavior.
- Spider on the Snow shows spiders during the winter in the Juneau area. Most of them appear to be Hammock Spiders (Genus Pityohyphantes). What I think is happening:
- 1. Lots of springtails run about on the surface of the snow. I suspect the spiders may be going after them. I have seen and photographed beetle larvae eating springtails on the snow.
2. From what I have read the spiders are freeze resistant but not freeze tolerant. I brought several of the spiders that appeared frozen home and gradually warmed them up and none "came back to life."
3. When the temperature warms and rains, or the snow starts to melt, and then the temperature plummets the spiders may not be able to access the leaf litter where many normally reside during cold snaps. This may be the main reason I see so many "frozen" on the snow surface.
For information about spiders and springtails in winter look at The Ecology of Inter-active Collembolans and Spiders
And Hibernation and Winter Habits of Spiders and Subzero Temperature Tolerance in Spiders: The Role of Thermal-Hysteresis-Factors and Ecological Aspects of Cold Resistance in Spiders * (A Comparative Study)
- Gray Whale in Mexico is a short video showing the whale on its breeding grounds in a lagoon during February in Baja California.
- They breed and winter in Mexico and migrate north through coastal waters (passing through Unimak Pass) to its summer feeding grounds in the Gulf of Alaska and Bering, Chukchi, and Beaufort seas.
- Of interest is they are the only benthic-feeding whale. They typically dredge through mud and use baleen to filter out bottom-dwelling amphipods and crustaceans. They often are seen surfacing with mud streaming from their mouth. They rarely feed on their breeding grounds in Mexico.
- For more information on this whale look at "Guide to Marine Mammals of Alaska" by Kate Wynne.