Category Archives: Wildlife

Interpretive Blogs about Wildlife and Plants

Dungeness crab (Cancer magister)

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Dungeness crab (Cancer magister)

The Dungeness crab is an important species on the West Coast, where it thrives in chilly Pacific Ocean waters. This species is a major driver for the fishing economies in  California, Oregon, and Washington.

These crustaceans have eight walking legs and two claws and prefer sandy bottom habitats in the intertidal zones to a depth of approximately 750 feet.

History

Dungeness crab have been harvested commercially on the West Coast since the mid-1800s when San Francisco fishermen began the fishery. For more than 100 years, the fishery has been regulated by size, sex, and season in order to preserve this important resource.

The commercial Dungeness crab season typically begins in early December and continues through the spring. Recreational crabbing is a popular, year-round activity on the Oregon Coast.

Regulations

Just make sure you’re aware of the regulations next time you head to the beach or the docks. Knowing how to play will help ensure this animal continues to provide a delicious food source and an important economic opportunity for coastal communities in the region.

Many coastal bait and tackle shops along the coast will help you get set up for an enjoying crabbing experience!

Tree Lupine (Lupinus arboreus)

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Public domain, Wikimedia Commons

What’s that soft yellow bush in the distance? It just might be a Tree Lupine (Lupinus arboreus). The common names are yellow bush lupine (US) or tree lupin (UK).

This perennial will grow to about 79-inches in full sun. Tree lupins typically live up to seven years and are hardy to 10˚F.

The attractive yellow flowers held on a 12-inch stem is rich in nectar and pollen. The gray-green leaves are palm-shaped and covered with fine, silky hair.

Lupins are attractive to many bees, butterflies, and moths. Tree Lupins host to ten or more butterflies and moths. Some have estimated the number to be upwards of 39 in total. Lupines do not appear to be attractive to birds.

Wolf?

The term lupine is from the Latin for “wolf,” referring to the mistaken belief that these plants deplete soil minerals. The opposite is actually true.

Many species of Lupine will collect nitrogen from the air. This ability gradually enriches surrounding soils and may displace native varieties adapted to more nitrogen-poor conditions.

Invasive Tendencies

Tree lupins are strong growers and can outcompete other grasses, forbs, and native plants. It grows in a number of different soils with good drainage including sand dunes and coastal sage scrub. At one time, this plant was used to stabilize sand dunes and other soils along the Oregon and California coast.

This species can threaten native plants through hybridization. There are approximately 220 species of lupines with many growing in the North American west.

Yellow Lupin creates a lot of seeds every year. These seeds persist in the soil for a very long time and can create a seed bank.

Unsprouted seeds collect and lay dormant in a shallow mat below the shrub. This seed bank will sprout with even minimal disturbance. Disturbances can include manmade or environmental. Even something like rodent activity or wind is enough to cause sprouting.

Lupins can be toxic depending on season, variety, and plant parts. Seeds for instance are often very toxic. A wide variety of less invasive and colorful lupines are available commercially.

REFERENCES:
–Tree Lupine, https://www.fws.gov/refuge/Humboldt_Bay/wildlife_and_habitat/YellowBushLupine.html
–Lupine, https://www.britannica.com/plant/lupine
—Lupine arboreus, https://calscape.org/Lupinus-arboreus-()

Black Bears, Ursus americanus

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Oregon is home to nearly 30,000 black bears, Ursus americanus, America’s most common bear species. They can grow up to six feet long and weight anything from 125 to 500 pounds. In fact, the name “black bear” is misleading, because they can have brown or gray coats.

If you’re on the lookout for bears in Oregon, you’ll only find black bears, since grizzlies haven’t been seen in the state since the 1930s. They make their home in Oregon’s abundant forests, where they create dens for hibernation, climb up trees, and forage.

If you’re really looking to find one, try visiting areas that have been clear-cut and allowed to grow for a few years. They are easier to spot, and they feed on the grass and brush.

They also feed on berries, nuts, and fruits; they can eat small mammals, insects, fish, and amphibians, but they are not usually actively hunting.

The best time to spot a black bear is in the middle of the summer, when their breeding season begins. Males and females will be more active, and yearling bears are becoming independent and can be seen roaming around roads and clear cuts. They are also independent animals, so don’t expect to see many in the same place.

Sources:

https://www.dfw.state.or.us/wildlife/living_with/black_bears.asp

http://www.oregonwild.org/wildlife/black-bear

http://ouroregoncoast.com/coast-notes-list/159-news/1309-black-bears-on-the-oreogn-coast.html