Bird of the Month

November 2021
Northern Harrier

With its stiff facial feathers in a disk shape, the northern harrier may give the impression that it might be an owl, but it is definitely a hawk! These unique features actually improve the bird’s foraging skills by enhancing its ability to hear the movements of prey hiding in vegetation. This is also a little ironic because in winter northern harriers occasionally roost on the ground with short-eared owls.

Northern harriers normally forage for small mammals and birds, but also take larger animals like rabbits and ducks. They are known to sometimes drown their prey, and normally eat on the ground.

Mature males and females measure 18 to almost 20 inches in length, weigh10.5 to 26.5 ounces, and have 30- to 46.5-inch wingspans. Adult males are gray above and whitish below, with black wingtips, dark trailing edges on their wings and black-banded tails. Females and juveniles are brown with black tail bands. Adult females have whitish undersides with brown streaks, while juveniles are buff-colored with fewer streaks. All northern harriers have the prominent white rump patch. The eyes of young males are yellow-green where those of juvenile females are brown, but with maturity the eye color for both sexes changes to yellow.

A male may mate with several females during the breeding season and select nesting sites, normally in dense vegetation such as willows, grasses, sedges, reeds, bulrushes or cattails. The male may also start construction while the female completes the nest, lining it with grasses, sedges and rushes. The female incubates the single seasonal brood, consisting of four or five pale white eggs, and cares for the hatchlings, while the male provides most of the food for the family. Incubation is 28-36 days, with a nesting time of about two weeks, and chicks hatch helpless and covered with short white down.

To add a northern harrier to your 2021 bird list, your best chance is to visit Willow or Watson Lake or the Highlands Center for Natural History this month, and with a luck you’ll be rewarded.

Happy birding!

October 2021
Osprey

The osprey is a migratory hawk that may cover over 160,000 miles in its lifetime.

John West

It has a slender body, long, narrow wings and long legs, reversible outer toes and hooked pads to help them hold slippery fish, and an awareness of aerodynamics demonstrated by carrying captured fish headfirst to minimize wind-resistance. While foraging, ospreys set the standard for concentration, as they dive with outreached talons and yellow eyes sighting straight along their talons.

Either sex weighs between 49.4 and 70.5 ounces, with body length of 21 to 23inches and wingspan of 59.1 to 70.9 inches. Brown above, white below, and generally lighter and whiter than most raptors, their white head shave a brown stripe between their eyes. Juveniles display white spots on their backs and buff shades on their breasts.

They feed primarily on live fish, but also consume fish carcasses, birds, snakes, voles, squirrels, muskrats and salamanders.

Ospreys nest from Alaska to New England, Montana to Mexico, and Carolina to California. Their preferred nesting habitat requires accessible fishing within a maximum of around twelve miles, and the nest is elevated, often on manmade structures like poles, channel markers, duck blinds and specially designed platforms. The nest is built with sticks and lined with bark, sod, grasses, vines, algae, or flotsam and jetsam.

The male collects the building materials and the female molds them into a structure initially less than 2.5 feet in diameter, but often expanding to 3-6 feet over the years. One seasonal brood consists of one to four cream- to cinnamon-colored eggs, speckled with reddish brown. Incubation is 26-42 days, nesting 50-55 days, and chicks hatch with down and eyes open. Eggs do not hatch all at once and older chicks often monopolize food, which can cause late hatchlings to starve if food is scarce.

Osprey populations grew by 2.5% per year from 1966 to 2015, and the species rates a 7 out of 20 on the Continental Concern Score.

While visiting Prescott’s many water features, be on the lookout for these beautiful and exciting raptors.

September 2021
American Kestrel

The American kestrel, sometimes referred to as the sparrow hawk, is North America’s most common and smallest falcon, about the size of a mourning dove.

John West

The male’s blue head and rust-colored back and tail, and the slightly larger female’s similar reddish wings, back and tail, contribute to the striking beauty of these colorful raptors. The wings are long, narrow, and tapered to points, and there are two black spots on each side of a white or orange nape, thought to confuse potential enemies by presenting a false set of ‘eyes.’

Despite their size kestrels are fierce predators, and can be seen perching on wires and poles or hovering into the wind as they forage. Their varied diet consists of grasshoppers, cicadas, beetles, dragonflies, scorpions, spiders, butterflies, moths, voles, mice, shrews, bats, small songbirds, small snakes, lizards and frogs.

American kestrels have three basic calls: a ‘klee’ or ‘killy,’ a ‘whine’ and a ‘chitter.’ The ‘klee’ is normally repeated in a rapid series when the bird is upset, excited, or courting. The male locates potential nesting sites and shows them to his mate, who makes the final decision. Since kestrels lack the ability to excavate nesting cavities, they use existing ones. Nests are usually in abandoned woodpecker holes, tree hollows, rock crevices and building nooks, as well as specially designed nesting boxes, such as those provided by your Prescott Audubon chapter. Nesting materials are not used, and if a site contains debris the female simply hollows out a shallow depression.

There are one or two broods per season, each with three to seven eggs. Incubation is up to 32 days with both parents participating. Born feeble, covered with slight amounts of light down and eyes closed, the young remain in the nest for about a month.

American kestrels rate 10 out of 20 on the Continental Concern Score, indicating low conservation concern. However, if current trends continue they will lose half their population by 2075.

Always beautiful and exciting to watch, be sure you add this species to your Big List!

American Robin

The American Robin, a North American songbird and our largest thrush, is common in gardens, parks, yards, golf courses, fields, pastures, deciduous woodlands, pine forests, shrub lands, and regenerating forests after fires or logging. 

A gray-brown bird with a large, round body, long legs and fairly long tail, orange beneath and dark-headed, it displays a white patch on its lower belly and under the tail during flight. Females have paler heads that contrast less with their gray backs. A robin’s presence is often broadcast with clear, lilting musical whistles.

They are known to visit feeders where mealworms or animal-fat suet are on offer, and can be attracted to a backyard with a proper nesting box if it is installed well before breeding season.

They forage on earthworms, insects, snails and fruit, and seem to consume certain foods depending on the time of day, i.e. earthworms for breakfast and fruit later in the day (especially if there are bugs in it). During fall and winter robins may become intoxicated after eating fermented honeysuckle berries.

The female chooses the nesting site, typically hidden on a low to mid-level, horizontal tree branch, but occasionally on the ground in a thicket. The nest, six to nine inches across and three to six inches deep, is constructed by pressing dead grass, twigs, paper, feathers, rootlets or moss into a cup shape using the wrist of her wing, and finalized with mud for strength and grass for comfort.  

There are up to three broods a year of three to five eggs each. The young are born helpless and naked except for sparse white down. Sadly, 40% of nests fail to successfully produce young, and only 25% of fledglings survive to November.

The American robin is considered a common backyard bird in North America, with a current world population estimated at 310 million, and not considered threatened.

One of the first birds a child learns about and a species replete with history, mythology and stories, this is certainly one species every birder looks forward to adding to the list. Happy Birding!

July 2021
Brown-Headed Cowbird

Brown-headed cowbirds have an unorthodox method of raising families. While the non-monogamous male plays the field, impregnated females forego the boring task of nest-building and simply deposit their eggs (up to 36 per season) in a host species’ nest!

The chicks are born naked except for scant clumps of down, eyes closed and helpless. But since they usually grow faster than their nestmates and are aggressive, they receive more attention and food than the foster parents’ actual offspring, and they thrive, often at the expense of the host’s young.

Though the cowbird’s behavior suggests poor parenting skills, it’s noteworthy that parents often return to the host nest to check on how their abandoned chicks are doing!

Brown-headed cowbirds frequent fields, meadows and lawns, often mixing with other blackbird flocks. Even in a mixed flock the males stand out because of their glossy black feathers and brown heads, while the females display an unmarked brown appearance. The male’s loud gurgling call and the female’s constant chatter also help identify them.

These ground-feeders may visit backyards where grain has been scattered, or may visit bird feeders. When not displaying or feeding, they often perch high on prominent tree branches. They also feed on insects attracted by livestock, which earned them the “cowbird” moniker in 1839.

Adult males weigh up to 1.8 ounces and are up to 8.7 inches in length, with over 14-inch wingspans. Females are slightly smaller, 1.6 ounces, up to 7.9 inches long and with wingspans under 13 inches.

Cowbirds that are permanent residents in the southern US rarely migrate, while northern birds travel to the southern US and Mexico for winter, returning to their customary summer habitats around March or April.

Rated a seven of 20 on the Continental Concern Score, they are not on the 2014 State of the Birds Watch List.

These lively, noisy and energetic birds are fine candidates for a Big List, so keep your eyes and ears open around large flocks of blackbirds. Happy Birding!

June 2021
White-Winged Dove

White-winged doves are plump, square-tailed and thin-billed, displaying a white stripe on the front edges of their wings that spreads to a bright flash during flight. Primarily grayish-brown with dark lines on their cheeks, they have relatively small heads and their tails have white tips accented with black stripes. They measure up to 11 inches in length, with wingspans of almost 23 inches and weigh around five and a half ounces.

They prefer bulky seeds because of their large bills, and have an eating style of appreciating their food, rather than pecking like chickens and other doves, like the mourning dove. They also ingest small pebbles into their gizzards to aid food-processing. They often visit bird feeders and are fond of sunflower, milo, corn and safflower, but will also forage for berries.

They usually breed in woodland interiors, near feeding habitats like grain fields or desert cactus communities. During the winter white-winged doves are present throughout most of their breeding range, but some individuals wander widely across the continent.

Russ Chappell

Males choose the general nesting area and gather building materials, but the female selects a nesting site and builds the nest, usually on a branch or shaded crotch of a tree. A flimsy bowl about four inches across is constructed of twigs mixed with weeds, grasses or moss, and occasionally lined with leaves, bark, feathers or pine needles.

There are two broods per season of one or two creamy white or buffcolored eggs, around one inch in width and length. Incubation is 14-20 days, nesting time 13-18 days, and hatchlings are born helpless, eyes closed, with long off-white down.

If predators approach the nest, a white-winged dove may fake a broken wing as a distraction, or in other circumstances fly into a brushy area. When startled near houses they sometimes fly into windows, so making sure your windows are bird-safe is a nice touch. 

This species rates an eight out of 20 on the Continental Concern Score, and is not on the 2014 State of the Birds Watch List.

Happy Birding!

May 2021
Violet-Green Swallow

The violet-green swallow’s name comes from the coloration of its back and rump.

John West

This beautiful little bird can appear dark until its metallic-green back and shimmering purple rump capture the rays of the sun! A small bird, it averages slightly over four and a half inches in length, with a 10.6-inch wingspan and weighs half an ounce. Common in our area during spring and summer, they migrate to Mexico and Central America for the winter.

They routinely forage for insects over our lakes and ponds in groups of over a hundred, intermingling with other swifts and swallows, but they are easy to identify by white patches on the sides of their hindquarters and cheeks. Viewing them at a distance with binoculars makes following their flight easier since they can reach speeds of up to 28 miles per hour, around the cruising speed of a peregrine falcon! Similar to other cavity dwellers, they attract more parasites than species nesting in the open, thus they sunbathe and preen frequently, providing easier viewing and photographing as they perch on power lines and dead trees.

Breeding in open evergreen and deciduous woodlands, they prefer areas with dead trees featuring woodpecker holes or other cavities. Male and female build the nest, which can take up to 20 days. Constructed with grass, twigs, rootlets and feathers, the cup-shaped nest is up to three inches across, depending the cavity or nesting-box size.

There are one to two broods per season, each consisting of four to six white eggs, less than an inch in length and width. Incubation is around 14 days, with a nesting period of about 24 days. Hatchlings are born naked, eyes closed and with scarce patches of down on their backs, crowns, and scapulars.

Common throughout the West, this species is rated nine out of 20 on the Continental Concern Score, and is not on the 2016 State of North America's Birds Watch List.

This is a great time of the year to add this beautiful little bird to your list as it brings a smile to your face. Happy birding!

April 2021
Western Bluebird

Western bluebirds sit on low perches to pounce on prey below. They are primarily insectivorous during the summer, but during the winter can be attracted to backyard feeders with mealworms. 

Western Bluebird by John West

Deep blue, rusty and white, males are more colorful than the gray-brown, blue-shaded females. They are small and stocky, with straight bills and fairly short tails, measuring six to seven inches in length, with average twelve-inch wingspans and weighing about an ounce.

A social species, they form flocks of up to a hundred, sometimes joining with mountain bluebirds, American robins and yellow-rumped warblers as they forage for insects or berries, and vocalize their quiet, chortling calls. They can also be attracted to a partially wooded yard by putting up nest boxes equipped with predator shielding.

Western bluebirds may have a gentle look, but when territory battles occur, one male may attack the other’s legs, dragging him to the ground and aggressively pecking at him. Residing in open woodlands and at the edges of woods, this small thrush is a cavity dweller, nesting in tree cavities or nest boxes and often socializing in small flocks.

The female does most of the nest construction over a two-week period, gathering grasses, straw, pine needles, moss, other plant fibers and fur to build and line the nest in an irregular shape.

There are up to three broods per season, consisting of two to eight pale blue or white eggs measuring less than an inch in length and width. Incubation times range from twelve to 17 days, with a nesting period of 18 to 25 days. The young hatch naked with pink skin, light gray down and eyes closed.

Rated nine out of twenty on the Continental Concern Score, the Western bluebird is not on the 2016 State of North America's Birds Watch List.

If you are feeling blue, a trip to one of our local wooded areas may be just what the doctor ordered, because this beautiful little bird will certainly cheer you up!

The Prescott Audubon Society is an official chapter of the National Audubon Society. Check it out online at PrescottAudubon. Org.

March 2021
American Dipper

If American Dippers are to be trusted — and hey, they’re really quite discerning — then Fain Park has a pond with quality water. They’re very selective and avoid even mildly polluted waters.

These casual, transient winter visitors normally prefer clear, fast-running streams, where they feed on aquatic insect larvae like caddis flies, mayflies, beetles, bugs and mosquitoes, as well as adult insects, worms, snails, fish roe and small fish. They are rarely seen on ponds or lakes.

Also known as the water ouzel, the American Dipper is stout and dusky grey with some brown on the head, bright white eyelids and a thick bill, 5.5-8” in length and weighing 1.5-2.4 ounces. It has a nictating membrane, like an extra eyelid, which helps it see underwater, as well as scales to block its nostrils when submerged.

Permanent residents in a territory ranging from Alaska to Panama, some dippers stay through the winter where streams remain unfrozen. Others relocate to lower elevations and southward for wintering.

To help them tolerate cold water they have a relatively low metabolic rate, extra oxygen-carrying capacity in their blood, thick feathers and generous quantities of secreted oil, which keeps them warm when feeding underwater. When they’re not foraging you can catch them bobbing up and down on a rock or the shore.

The dipper is North America’s only aquatic songbird, its loud song consisting of high whistles and trills, “peee peee pijur pijur.” Both genders sing year-round. They defend the territory along the streams they frequent, and while feeding underwater may fall prey to bull or Dolly Varden trout. Unlike most songbirds they go through total molts as ducks do, rendering them flightless by late summer.

They construct globe-shaped nests with side entrances, on ledges or banks near the water, behind waterfalls or under manmade structures. Normally the female incubates 2-4 white eggs, which hatch in 15-17 days. The young grow into fledglings 20-25 days later.

This unique bird may still be hanging out at Fain Park, and perhaps you can add it to your bird book!

February 2021
Gadwall

Male ducks often display glossy green, red, or blue colors, so with its gray-brown body and black patch on its tail, the Gadwall is easy to overlook. Females are dappled brown and buff, with thin, orange edges on their darker bills, and both sexes display white wing patches in flight and occasionally while swimming or at rest.

Approximately the size of mallards, Gadwalls have relatively square heads with sharp foreheads, bills that are more delicate than the mallard's, and in flight their necks are noticeably smaller and wings slimmer. They average 20 inches in length, weigh between one to two and three-quarter pounds, and have 33-inch wingspans.

These dabbling ducks feed on aquatic vegetation such as algae, grasses, rushes, sedges, pondweed, widgeon grass and water milfoil, including leaves, stems, roots, and seeds. They also consume snails, midges, water beetles and other invertebrates, especially during the breeding season. Gadwall also routinely steal food from surfacing diving ducks and coots!

Mating begins in late fall, and breeding is primarily in the Great Plains and prairies. During winter they reside on reservoirs, ponds, water wetlands, parks, sewage ponds or muddy inlets where there is aquatic vegetation.

They nest on islands within marshes, providing some protection from predators like foxes, weasels, mink, coyotes and badgers, but winged predators are still a threat. The female scrapes out a cup-shaped depression about a foot across and three inches deep, then uses her body as a mold as she adds twigs and leaves, finally insulating the nest with her own down feathers.

There is one brood per season consisting of seven to twelve eggs, which are laid one per day, and about one and a half inches by two inches in size. They incubate in 24 to 27 days. The chicks are able to leave the nest in one or two days. 

Gadwall are not considered threatened, although they are the number three most-hunted duck in America.

March is a good time to visit our local lakes and add this unique duck to your personal birding list!


January 2021
Canada Goose

During fall and winter Prescott hosts migrating Canada geese, normally spotted on our beautiful lakes, occasionally in grassy backyards, park lawns or farm fields.

During migration long V-formations may be seen, however more geese are foregoing travel, because increased urban development is creating more parks and lawns that attract this species. They are also often heard flying, by day or night, with their honking calls that distinguish them from other species of geese or swans.

Canada geese are large water birds with long black necks, brown backs, tan chests, distinctive white cheeks and chin straps, and wide, flat bills. They can measure from 30 to 44 inches in length, have wingspans exceeding five feet, and weigh up to 20 pounds.

They feed by dabbling in the water or grazing at fields and large lawns. In spring and summer, they feed on grasses and sedges, including skunk cabbage leaves, and during fall and winter they rely on berries and seeds, specially enjoying blueberries.

The female constructs the family nest on ground in an elevated area, near water and with unobstructed views. The large cup-shaped nest receives a layer of her personal down and body feathers after the second egg is laid, and she does all incubation while her mate stands guard.

There is one brood per season consisting of two to eight cream-colored eggs, slightly larger than two by three inches. Incubation is within 28 days, with total nesting time as long as 50 days. Born with yellow down and eyes open, the young leave the nest in a couple of days, able to walk, swim, feed and dive, and prior to leaving feed on their yolk sacs.

The young often remain with their parents for their first year, and as summer fades the families become more social, congregating in large flocks as food becomes more scarce and migration time approaches.

Their total North American population in 2015 was between 4.2 million and over 5.6 million, and although 2.6 million are harvested by hunters each year, the species is not considered threatened.