LEANING OAKS
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335. Orthosia mys

4/16/2024

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​This moth flies in October and November and is distinctively coloured from brick red to slightly pinkish -  similar to the colour of the bark of an Arbutus (Arbutus menziesii) (species 30).   In fact this larvae of this species feeds on Arbutus and Manzanitas (Arctostaphylos columbiana) on the island, and adds  A. patula and A. viscida to its diet further south in Washington,  Oregon, California and rarely, Arizona. This species was first described by Harrison Gray Dyar Jr. in 1903 (for more on the unusual life and hobbies of H.G. Dyar see Dyar’s Looper Moth species number 333).
The smooth larvae of this moth is brick red and brown and blends in with the bark of Arbutus trees and Manzanita bushes.
Unlike most Orthosia moths this species flies in the fall, almost all the others in the genus are spring fliers.  Rarely Orthosia mys overwinters as an adult and is seen in the spring.  We could not find a common name for this attractive moth although many Orthosia moths have the common name of Quaker, so this could be called the Arbutus Quaker..
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334. Hair Ice

4/8/2024

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I was delighted the first time I saw what I thought was just a beautiful ice formation on the path near our house. When I found out that it was a fungus I was astounded and went running back to find it again to photograph it....but it was gone.  A couple of days later on a cool morning we looked out the window and saw dozens of fallen branches and sticks covered in delicate white swirls! Most were on Garry Oak branches.

This exquisite formation of ice crystals depends on the fungus, Exidiopsis effusa. It was only in 2015 that researchers in Europe identified the white crustose fungus as the key to the formation of these delicate crystals, although a German scientist in 1918 had determined that it was indeed some sort of relationship between a fungus and ice in the wood . According to local mycologist, Kem Luther, E. effusa has not been specifically identified in BC yet, and as we have several other species of Exidiopsis it may actually be a different species here. 
​When the fungus is present in  the wood, when the water freezes within the wood, it creates a barrier that traps the water between the pores of the wood and the ice. A suction force is created that forces the water out through the pores into fine strands that are thinner than human hair. It is thought that the fungus allows the strands of ice to stabilize for several hours. 
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The conditions have to be humid, only slightly below freezing, between 45 to 55 degrees in the North latitudes and in broad-leaf or mixed wood forests for Hair Ice to form and previous to the January 2024 bonanza, the humidity, temperature and fungus all aligned in this area in 2019. Not that we saw it--a bit like a cloudy solar eclipse day! 

According to Kem Luther, the formations will emerge from the same pieces of wood in subsequent years, yet another reason not to clean up fallen wood. 

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    Two biologists on a beautiful property armed with cameras, smart phones and a marginal knowledge of websites took up the challenge of documenting one species a day on that property.  Join along! Posts and photographs by Leah Ramsay and David Fraser (unless otherwise stated); started January 1, 2014.


    Please let us know of any errors. All photographs are copyrighted; please contact us for use. 


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