Remarkably, tiny insects survive weeks and months of sub-zero cold each year. This post provides brief descriptions of how three common bugs manage this; Woollybear Caterpillars, Mosquitos, and Ticks. Woollybear Caterpillar (Pyrrharctia isabella) The woollybear hatches in the fall and overwinters in its caterpillar form, when it nearly freezes solid. Their bodies produce glycerol, a …
Monthly Archives: October 2019
Fall Colors; Tamaracks
The tamarack is unusual because it is the only conifer native to Minnesota that is not evergreen. The photos below show how local tamaracks have changed color from September to October prior to dropping all their needles. A disadvantage for deciduous trees is that they must expend considerable resources to make new leaves each year. …
Winter Survival; Trees
Gentle snow fell in Northwestern Minnesota in early October this year, providing a wintertime preview. Surviving winter temperatures far below freezing is a big challenge for plants and animals. Today’s post focuses on how trees make it through — with some scenic pictures of the recent snow. Trees are largely comprised of water, a critical …
Understory; Shrubbery #3, Sumac and Honeysuckle
Staghorn Sumac (Rhus typhina) and Smooth Sumac (Rhus glabra) Two species of sumac are widespread in Minnesota, Staghorn Sumac and the slightly more common Smooth Sumac. Staghorn Sumac bushes are larger, have fine hairs on their branches, and fuzzy fruit. The pictures below are likely a mix of Smooth and Staghorn Sumac. The tart fruit …
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Paul Bunyan Trail in October
Photographs in this posting show off fall scenery near Walker, Minnesota along the Paul Bunyan Trail, a Rails-to-Trails route between Crow Wing State Park and Bemidji (115 miles). This hilly and remote section of the trail, between highways 34 and 371, runs through the Chippewa National Forest. Scenic Overlook Fir and Aspen Forest Views
Patterns in Conifer Growth
Annual growth is reflected by patterns seen in the branches of conifer trees. Robert Knudson, a local biologist, points this out in a terrific YouTube video about our Northern Minnesota conifers. Pictures in this post illustrate two of the patterns featured in his presentation. Annual growth of Balsam Fir The pictures above show buds of …
Fall Colors; Why?
Interplay among three pigments is responsible for the changing colors seen in plant leaves each fall. Chlorophyll — this is the key green compound that enables the plant to convert sunlight and CO2 to sugar throughout the summer. Carotenoid — a yellow/orange compound that is present in the leaf throughout the year. When green chlorophyll …
North MN Outdoors 