Tag: Oregon

Oregon, nestled in the Pacific Northwest region of the United States, captivates with its diverse landscapes and vibrant culture. From the rugged coastline adorned with dramatic cliffs and sandy beaches to the lush, emerald forests that cloak much of its interior, Oregon boasts natural beauty that enchants visitors and residents alike. The Cascade Range cuts through the state, offering majestic peaks and pristine lakes, while the Willamette Valley is renowned for its fertile soils, ideal for agriculture and wine production. Cities like Portland and Eugene embody a blend of creativity, sustainability, and outdoor enthusiasm, making Oregon a haven for artists, outdoor adventurers, and those seeking a slower pace amidst breathtaking scenery.

White-throated Swift (Aeronautes saxatalis)

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The fast flying White-throated Swift (Aeronautes saxatalis)
The fast flying White-throated Swift (Aeronautes saxatalis)


The White-throated Swift is a medium-sized bird known for its swift and agile flight, sleek body, and distinctive white throat patch. Adults typically measure around 6.5 inches (16.5 cm) in length, with a wingspan of approximately 15 inches (38 cm). They have a dark, glossy plumage that aids in camouflage against the rocky cliffs where they often dwell. Their wings are long and slender, adapted for rapid and maneuverable flight, while their short bills are perfect for catching insects mid-air. Juveniles resemble adults but may have less contrast in their plumage.

Habitat and Distribution

White-throated Swifts are primarily found in the western regions of North America, ranging from the southwestern United States through parts of Mexico. They inhabit rugged, rocky terrain such as canyons, cliffs, and gorges, where they nest in crevices and on ledges. These birds are particularly well adapted to arid environments and are often seen in desert landscapes, although they may also occur in mountainous regions.

Behavior and Ecology

White-throated Swifts are highly adapted for aerial foraging, feeding primarily on flying insects such as flies, beetles, and mosquitoes. They are renowned for their impressive flight abilities, performing intricate maneuvers as they hunt on the wing. Their swift and agile movements enable them to navigate through narrow passages and steep cliffs with ease. Breeding pairs typically construct cup-shaped nests made of twigs, feathers, and saliva, which they attach to vertical rock faces. During the breeding season, males perform aerial courtship displays to attract females.

Conservation Status

The White-throated Swift is not currently considered globally threatened, although local populations may be impacted by habitat loss and disturbance. Conservation efforts are focused on protecting nesting sites, particularly in areas where cliffs are subject to human development or recreational activities. As an insectivorous species, White-throated Swifts may also be vulnerable to pesticide use, which can reduce their prey availability.


The White-throated Swift is a fascinating species well adapted to its rugged habitat and aerial lifestyle. Its graceful flight and striking appearance make it a favorite among birdwatchers and enthusiasts. By understanding the ecology and behavior of the White-throated Swift, we can better appreciate the importance of conserving its unique habitat and ensuring the long-term survival of this remarkable bird.

Field Guide Description

“Black above, black and white below, with long, forked tail. Distinguished from Violet-green swallow, (page 322) by longer narrower wings, bicolored underparts. In poor light, may be mistaken for Black Swift but smaller, with faster wingbeats. Common in mountains, canyons, cliffs. Nests in crevices.”

Field Guide to the Birds of North America, Third Edition, pg 262

Classification

KingdomAnimalia
PhylumChordata
ClassAves
OrderApodiformes
FamilyApodidae
GenusAeronautes
Speciessaxatalis

Resources

Northern Flicker (Colaptes auratus)

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The Northern Flicker (Colaptes auratus) is a medium-sized woodpecker found across North America. It belongs to the family Picidae, which includes woodpeckers, sapsuckers, and flickers. This species is known for its distinctive sharp bill, behavior, and widespread distribution.

Northern Flicker nesting in the cedar siding of a Big Bear mountain cabin.
Northern Flicker nesting in the cedar siding of a Big Bear mountain cabin.

Description

The Northern Flicker exhibits sexual dimorphism, with males and females displaying different coloration. They have a length ranging from 28 to 36 centimeters (11 to 14 inches) and a wingspan of approximately 42 to 54 centimeters (16.5 to 21.3 inches).

  • Plumage: The upperparts of the Northern Flicker are brown with black barring, while the underparts are beige or tan with black spots. They have a black bib on their chest and a prominent black crescent on the breast. The undersides of their wings and tails are a vibrant yellow or red, depending on the subspecies.
  • Head: Their head is distinctive, with a gray face, a long, slightly curved bill, and a black malar stripe extending from the base of the bill to the neck.
  • Behavior: Northern Flickers are primarily ground foragers, often seen hopping on lawns or probing the soil for insects with their long, barbed tongues. They also feed on ants, beetles, termites, and fruits.

Habitat

Northern Flickers inhabit a variety of habitats, including open woodlands, forest edges, parks, suburban areas, and occasionally urban environments. They prefer areas with scattered trees and ample open ground for foraging.

Breeding and Nesting

Breeding season for Northern Flickers typically begins in late April and extends into August. They are cavity nesters and will excavate their own nest holes in dead or decaying trees, fence posts, or even buildings.

  • Eggs: Clutch sizes usually range from 3 to 8 eggs, which are white and elongated.
  • Incubation: Both parents participate in incubating the eggs, which lasts for about 11 to 14 days.
  • Fledging: The young birds fledge after approximately 25 to 28 days and remain dependent on their parents for several weeks after leaving the nest.

Migration

Approximate range/distribution map of the Northern Flicker (Colaptes auratus). In keeping with WikiProject: Birds guidelines, yellow indicates the summer-only range, blue indicates the winter-only range, and green indicates the year-round range of the species.
Approximate range/distribution map of the Northern Flicker (Colaptes auratus). In keeping with WikiProject: Birds guidelines, yellow indicates the summer-only range, blue indicates the winter-only range, and green indicates the year-round range of the species.

While some Northern Flicker populations are migratory, others are year-round residents. Migratory populations breed in northern regions and winter in southern areas, while non-migratory populations may remain in the same area throughout the year.

Conservation Status

The Northern Flicker is widespread and generally considered to be of least concern in terms of conservation status, according to the International Union for Conservation of Nature (IUCN). However, habitat loss and fragmentation, as well as competition for nest sites with invasive species such as European Starlings, pose localized threats.

The Northern Flicker is a fascinating species with its distinctive appearance, behavior, and adaptability to various habitats. Understanding its ecology and conservation needs is crucial for ensuring the continued well-being of this iconic woodpecker across its range. Further research into its nesting habits, population dynamics, and response to environmental changes can aid in effective conservation strategies.

Field Guide Description

“Two distinct groups occur: “Yellow-shafted Flicker” in the east and far north, and the “Red-shafted Flicker” in the west. These flickers have brown, barred back; spotted underparts, with black crescent bib. White rump is conspicuous in flight; no white wing patches. Intergrades are regularly seen in the Great Plains. “Yellow-shafted Flicker” has yellow wing lining and undertail color, gray crown, and tan face with a red crescent on nape. “Red-shafter Flicker” has brown crown and gray face, with no red crescent.”

Field Guide to the Birds of North America, Third Edition, pg 318

Classification

KingdomAnimalia
PhylumChordata
ClassAves
OrderPiciformes
FamilyPicidae
GenusColaptes
Speciescauratus

References

Western Gray Squirrel  (Sciurus griseus)

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The Western Gray Squirrel (Sciurus griseus) is a tree squirrel species native to the western United States. Known for its striking appearance and arboreal lifestyle, this species plays a significant ecological role in its habitat.

Western Gray Squirrel  (Sciurus griseus) enjoying a peanut in the San Bernardino Mountains, California
Western Gray Squirrel  (Sciurus griseus) enjoying a peanut in the San Bernardino Mountains, California

Description

The Western Gray Squirrel displays notable characteristics in its appearance and behavior.

  • Size and Coloration: Adults typically measure between 46 to 61 centimeters (18 to 24 inches) in length, including their bushy tail, which comprises about half of their total length. They weigh between 400 to 700 grams (14 to 25 ounces). The coloration of their fur varies geographically but generally includes shades of gray, with white underparts and a distinctive white fringe on their tails.
  • Habitat and Range: Western Gray Squirrels inhabit a variety of forested habitats, including mixed coniferous forests, oak woodlands, and riparian areas. Their range extends from Washington and Oregon through California and into parts of Nevada.
  • Behavior: These squirrels are primarily arboreal, spending much of their time in trees. They are agile climbers, using their strong hind limbs and sharp claws to navigate branches with ease. They build nests, called dreys, out of twigs and leaves in the canopy for shelter and raising young.

Diet

The Western Gray Squirrel is omnivorous, with a diet consisting of a diverse array of food items.

  • Vegetation: They feed on a variety of nuts, seeds, fruits, berries, and acorns. Oak trees are particularly important food sources, and these squirrels play a role in seed dispersal and forest regeneration by caching and forgetting seeds.
  • Insects: In addition to plant matter, they also consume insects, bird eggs, and small vertebrates, supplementing their diet with protein-rich prey.

Range

Reproduction

Breeding typically occurs from late winter to early spring, with females giving birth to one to six young, though litter sizes usually range from two to three. The gestation period lasts approximately 36 to 40 days. The young are born hairless and helpless, relying on their mother for warmth and nourishment until they are weaned at around 10 to 12 weeks of age.

Conservation Status

The Western Gray Squirrel faces several threats to its populations, primarily due to habitat loss and fragmentation, as well as competition and predation from invasive species such as the Eastern Gray Squirrel (Sciurus carolinensis). Additionally, urbanization, logging, and wildfires have further impacted their habitat and population dynamics. While specific conservation efforts vary across their range, maintaining and restoring suitable habitat and implementing measures to mitigate human-wildlife conflicts are essential for the long-term survival of this species.

The Western Gray Squirrel is a charismatic and ecologically important species in western North American forests. Understanding its biology, behavior, and conservation needs is crucial for preserving its populations and ensuring the health of forest ecosystems where it resides. Continued research and conservation efforts are necessary to address the various threats facing this iconic tree squirrel species.

Classification

KingdomAnimalia
PhylumChordata
ClassChordata
OrderMammalia
FamilyRodentia
GenusSciurus
Speciesgriseus

References

California Goldfields ( Lasthenia californica )

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Lasthenia californica, commonly known as California goldfields, is an annual flowering plant belonging to the family Asteraceae. It is native to California and is particularly prominent in the coastal ranges and valleys. This species is well-known for its vibrant yellow blooms that contribute significantly to the wildflower displays in California during the spring.

California Goldfields ( Lasthenia californica )
California Goldfields ( Lasthenia californica )

Taxonomy

  • Kingdom: Plantae
  • Clade: Angiosperms
  • Clade: Eudicots
  • Clade: Asterids
  • Order: Asterales
  • Family: Asteraceae
  • Genus: Lasthenia
  • Species: L. californica

Morphology

Lasthenia californica is characterized by its bright yellow, daisy-like flowers. The plant typically reaches heights of 10-50 cm. Key morphological features include:

  • Stems: Erect, slender, and often branched.
  • Leaves: Basal leaves are linear to narrowly oblanceolate, often covered with fine hairs.
  • Flowers: Inflorescences are capitula, composed of numerous yellow ray and disk florets.
  • Fruit: Achene, with each achene being topped with a pappus aiding in wind dispersal.

Habitat and Distribution

Lasthenia californica is commonly found in a variety of habitats including grasslands, coastal prairies, and open woodlands. It thrives in areas with well-drained soils and full sunlight. The plant’s distribution is largely concentrated in California, though it can also be found in parts of Oregon, Nevada, and Baja California.

Ecology

California goldfields play a significant role in their ecosystems. They provide nectar and pollen for various pollinators, including bees, butterflies, and other insects. The plant’s early blooming period helps sustain pollinator populations before other wildflowers and crops bloom.

Reproduction

Lasthenia californica reproduces sexually through seed production. The flowering period extends from February to May, during which pollination occurs primarily via insects. After pollination, seeds develop and are dispersed by wind and gravity. The seeds have a dormancy period that allows them to germinate under favorable conditions in the following year.

Conservation Status

Lasthenia californica is not currently listed as endangered or threatened. However, its habitats are often threatened by urban development, agriculture, and invasive species. Conservation efforts focus on preserving native habitats and controlling invasive species to ensure the continued survival of this and other native wildflower species.

Cultural and Economic Importance

California goldfields are valued for their aesthetic contributions to natural landscapes and wildflower displays. They are also studied for their ecological interactions and adaptability to various environmental conditions. Additionally, they are used in restoration projects aimed at re-establishing native plant communities.

Lasthenia californica is a vibrant and ecologically significant wildflower native to California. Its bright yellow blooms are a hallmark of the spring season in many regions, contributing to the biodiversity and aesthetic value of the areas they inhabit. Understanding the biology, ecology, and conservation needs of this species is essential for preserving its role in native ecosystems.

References

Creek Dogwood (Cornus sericea)

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Cornus sericea, commonly known as Redosier Dogwood, Red Twig Dogwood, or American Dogwood, is a deciduous shrub native to North America. It belongs to the family Cornaceae and is known for its striking red stems, especially visible in the winter, which provide ornamental value. This report explores the botanical characteristics, habitat, ecological significance, and uses of Cornus sericea.

Creek Dogwood (Cornus sericea)
Creek Dogwood (Cornus sericea)

Botanical Characteristics

Morphology

  • Stems and Bark – The most distinctive feature of Cornus sericea is its bright red stems, which are particularly vibrant in young twigs. The bark is smooth and can be greenish-red in younger branches, turning grayish-brown with age.
  • Leaves – The leaves are opposite, simple, and ovate to lanceolate, with a length of 5-12 cm. They have a smooth margin and are characterized by prominent venation. In the fall, the leaves turn a variety of colors including red, purple, and orange.
  • Flowers – The flowers are small, creamy-white, and arranged in flat-topped clusters called cymes. Each flower has four petals and blooms from late spring to early summer.
  • Fruit – The fruit is a small, white to bluish-white drupe, typically maturing in late summer. These drupes are an important food source for various bird species.

Growth and Reproduction

Cornus sericea can grow up to 1.5-4 meters in height and spreads through both seeds and vegetative means. It readily forms thickets by sending up new shoots from its root system. The plant prefers moist, well-drained soils but can tolerate a range of soil types including wet, clay soils.

Habitat and Distribution

Geographic Range

Cornus sericea is widespread across North America, from Alaska and Newfoundland south to New Mexico and Virginia. It thrives in a variety of habitats including wetlands, stream banks, and forest edges.

Environmental Preferences

This shrub prefers full sun to partial shade and thrives in moist, well-drained soils. It is often found in riparian zones, wetlands, and along the edges of lakes and rivers. Cornus sericea is adaptable to different soil types, including clay and sandy soils, and can tolerate seasonal flooding.

Ecological Significance

Wildlife Habitat

  • Birds – The berries of Cornus sericea are a crucial food source for many bird species, including American robins, cedar waxwings, and woodpeckers. The dense thickets provide excellent cover and nesting sites for birds.
  • Mammals – Small mammals, such as rabbits and beavers, feed on the bark and stems. The plant’s dense growth offers shelter for various small animals.

    Erosion Control

    Due to its extensive root system, Cornus sericea is effective in stabilizing soil and preventing erosion, especially along riverbanks and slopes. It is often used in riparian restoration projects for this reason.

    Uses

    Ornamental Use

    Cornus sericea is widely planted as an ornamental shrub for its vibrant red stems, which provide winter interest in gardens and landscapes. It is also used in hedges, windbreaks, and as a natural screen.

    Traditional and Medicinal Uses

    Indigenous peoples of North America have historically used Cornus sericea for various purposes. The bark and stems were used in basket weaving, and the plant had medicinal applications, such as treating colds, fevers, and diarrhea.

    Conservation and Restoration

    Due to its ability to thrive in wet environments and stabilize soil, Cornus sericea is utilized in wetland restoration and conservation projects. It helps in maintaining biodiversity and improving water quality by filtering runoff.

    Conclusion

    Cornus sericea is a versatile and ecologically significant plant with wide-ranging benefits for wildlife, soil stabilization, and ornamental use. Its adaptability to different environments and its role in supporting biodiversity make it an important species in North American flora. Conservation and utilization of this shrub can contribute to sustainable environmental management and restoration efforts.

    This report provides a comprehensive overview of Cornus sericea, highlighting its importance in various ecological and practical contexts. Further research and conservation efforts can enhance our understanding and utilization of this valuable plant species.

    Resources