A softer note, heard during active courtship and display, sounds

like _wake-up, wake-up, wake-up_, or _yarrup, yarrup, yarrup_,

given more deliberately in subdued tones and not so prolonged. This

has been referred to as the scythe-sharpening, or rollicking, song

and has also been written as _yucker, yucker, yucker_, or _wicker,

wicker, wicker_, or _hick-up, hick-up, hick-up_, or _flicker,

flicker, flicker_. Mr. Bicknell (1885) has recorded these notes from

April 8 to September 5; there seems to be no seasonal regularity

about them, as they are probably affectionate notes of greeting.

Mr. Burns (1900) “heard an apparently rare variation, a metallic

_Ka-wick-wick-wick-wick-wick-wick-wick-wick-wick-wick-ka_ by the male

while close to the nest.”

He gives as conversational, or soliloquizing notes, “commonly a

scanny, gurgling, almost involuntary _chur-r-r-r_ as danger seems

to threaten it when on the wing, or when flushed from the ground or

just before a-lighting, which may be interpreted as a note of warning

or announcement of arrival according to the circumstances. I have

heard a low guttural _who-del_ as it endeavored to balance itself on

a slender branch immediately after arrival.” A bird on a house roof,

in December, “uttered an odd guttural call of _huck-a-woó-ah_ or

again only _woo woo_ evidently for his own edification.” Other soft

conversational notes sound like _ouit-ouit_, or _puir-puir_, or a

cooing _yu-cah-yu-cah_.

Dr. Eaton (1914) says: “When the flicker flies up from the ground

and alights on a stub or fence post, he frequently bobs and bows to

an imaginary audience and immediately thereafter jerks his head high

upward giving voice to a sharp note like the syllable ‘clape.’” This is

a loud, explosive note and may indicate defiance or surprise.

A common note, oftenest heard during summer and fall, is a plaintive

call suggesting one of the notes of the blue jay or the red-shouldered

hawk. It is a loud and rather musical note, which has been variously

interpreted as _pee-ut_, _ye-a-up_, _pee-up_, _que-ah_, _kee-yer_,

etc., given singly or repeated two or three times, as a ringing call of

considerable carrying power.

_Field marks._--While hopping about on the lawn, the flicker may be

recognized as a brown bird somewhat larger than a robin and with a

rather long bill; if facing the observer, the black crescent on the

spotted breast is rather conspicuous, but the red crescent on the

nape does not show up much except at short range, nor does the black

malar patch of the male. The most conspicuous field mark is the white

rump, which shows plainly as the bird rises from the ground and flies

away; this probably serves as a direction mark, or a warning to the

companions with which it is often associated. Then, of course, the

flash of bright yellow in the wings and tail marks the bird in flight,

chiefly when high in the air, but somewhat also in straightaway flight.

_Enemies._--When I was a boy, 50 or 60 years ago, flickers,

meadowlarks, and robins were considered legitimate game, and they were

very good to eat. Bunches of these birds were often seen hanging in the

game dealers’ stalls. During our fall vacations on the coast, when the

weather was unfavorable for coot shooting, my father and uncle used

to resort to the uplands to shoot “partridge woodpeckers” and “brown

backs” (robins) among the bayberry bushes and sumacs. And flickers were

slaughtered in large numbers in the South. Man was then the flicker’s

worst enemy, but that is now all ancient history, as these birds are

now protected. But a new enemy has been introduced, which is probably

worse than the old one. The European starling has come to compete with

the flicker in its search for a food supply. The starlings are now

so abundant that they swoop down in flocks on the formerly plentiful

supply of wild fruits and berries, stripping the trees and bushes clean

of the fruits on which the flickers and robins depended for their

summer and fall food. They also compete for nesting sites, fighting

for or usurping every available cavity, even driving the flickers

from the homes that they had made. Lester W. Smith writes to me: “For

several years after the starling became common in Connecticut, other

birds, especially the flicker, were seldom ejected, or not until all

available nesting possibilities about buildings were used and filled

up. Never have I seen the flickers actually fight to retain their hole

or bird house. On the sanctuary they were exceptionally noisy whenever

starlings attempted to take or had taken possession. On one occasion

three starlings took part; one remained in the entrance hole of the box

and took dry grass that a second brought to it; the third chased off

either of the pair of flickers, as it flew near the nest box, which

was about 8 feet from the ground on a sawed-off tree in a white-pine

grove. On shooting one of the starlings, the other four birds flew away

temporarily, and, on examination, I found a thin layer of grass over

the flicker’s eggs. In 15 minutes the starlings returned and a second

was shot. I removed the grass, and, hiding nearby, I saw nothing more

of the third starling; but the flickers returned soon, took possession

of the box, and later raised the five young.”

Sydney R. Taber (1921) tells an interesting story of a battle between

a male flicker and a pair of starlings for the possession of the

flickers’ nest. The flicker had once pulled one of the starlings out of

the hole, but, during his absence, both of the starlings entered the

hole.

On this second occasion, despairing of being able to pull

the two out at long range, so to speak, the Flicker also

plunged into the hole. Then followed a battle royal,

lasting for what seemed minutes. It was rather ghastly

to imagine the blows that were being dealt at closest

quarters; not a sound was emitted, but one could imagine

what was going on within the hole by the feathers that flew

from it. The first bird to emerge--that is, to be pushed

out, by fractions of an inch--was one of the Starlings,

which then flew away. The fight between the other two birds

then continued out of sight until something appeared at

the mouth of the hole. This proved to be the tail of the

Flicker. When he had backed out of the hole into view once

more, it appeared that he and the remaining Starling had

clinched in a desperate grapple. With the latter gripping

one of the wings of the Flicker, they fell, fluttering and

fighting, a distance of nearly 40 feet; but just before

touching the ground, they parted and flew in different

directions. * * *

The above events occurred a fortnight ago. Since then the

Starlings have been in full possession of the hole of

contention.

Flickers figure largely in the food of duck hawks; their brightly

colored feathers are often found about the aeries. Other hawks

take their toll. O. A. Stevens sends me the following note on a

sharp-shinned hawk attacking a flicker, perhaps only in sport: “The

hawk settled in a partially dead, spreading pine tree, some 8 feet

from the top. A flicker perched about 6 feet above him, apparently

from curiosity. For some time they remained, the hawk sitting quietly,

preening, occasionally casting a glance at the flicker. The latter

teetered about on his perch, craning his neck at the hawk and even

dropping down a foot or so. After at least 10 minutes, the hawk

suddenly darted at the flicker and away they went, the flicker twisting

and escaping. It seems odd that an apparently heavy flier like a

flicker would escape so easily.”

Mr. Burns (1903) adds the broad-winged hawk to the flicker’s enemies;

“a nest of lusty young hawks examined in July, ’01, contained the

primaries and rectrices of one or two young Flickers, probably just

out of the nest. * * * To the above Mr. Benj. T. Gault adds the

Blacksnake--one having been killed and cut open by a farmer’s lad at a

place he was stopping at in Reynolds county, Missouri, contained the

body of one of these woodpeckers.” I have positively recorded flickers

in the food of the marsh hawk, Cooper’s hawk, and red-shouldered

hawk; probably they are killed by all the larger hawks and owls.

Taverner and Swales (1907) say that the sharpshin flights at Point

Pelee discommoded the flickers less than any other species of small

birds. “Though at times they seemed uneasy and restless, they were

perfectly able to take care of themselves and easily made their escape

when attacked. * * * The usual course of procedure of the Flicker,

when attacked by a hawk, was to wait until the last minute, when the

hawk, in its swoop, was just about to seize its victim, and then dodge

quickly to the other side of the limb. In every case observed the ruse

worked perfectly, and we found only once the feather remains which

proved that once in a while the hawk was a little too quick for the

Flicker.”

Mr. Burns (1900) says that the eggs and young are sometimes destroyed

by squirrels, weasels, mice, crows, jays, and the red-headed

woodpecker. Fred. H. Kennard records in his notes that a pair of

flickers, nesting in one of his boxes, were robbed of their eggs by

some red squirrels, who ate the eggs in the box, built their own nest

in the box, and brought in their young from another nest.

_Fall._--As soon as the young are strong on the wing and the molting

season is over, the flickers, old and young, begin to gather into loose

flocks or scattered parties, perhaps family parties, late in summer

and early in fall. On cold, windy autumn days they may be found in

close companionship in hollows and sheltered localities in woodland

clearings, protected from the cold winds, and feeding in the bayberry

patches and clumps of staghorn sumac. At such times, they lie close and

can be easily approached.

In southern Canada and the Northern States, the great bulk of the

flickers start to migrate in September, continuing to pass southward

during October. Mr. Burns (1900) says of the fall migration: “While the

retrograde movements are conducted in larger numbers, being recruited

by great numbers of birds of the year, it is scarcely as noticeable,

lacking the noise and bustle of Spring arrivals. Like the Robin, its

whole nature seems to have undergone a change. It no longer solicits

notice by song or display, but becomes shy and suspicious, and while

gregarious to a great extent, in flight every one is capable of looking

out for itself. The mature birds are the most wary, and by example

prepare the young for the dangers of migration and Winter residence in

the South, where it is constantly menaced by hunters.”

During migration, they fly rather high, well above the treetops, in

widely detached flocks, often far apart, but keeping more or less in

touch with each other and sometimes fairly close together; hundreds

may be counted, as they pass in a steady stream for hours at a time.

Taverner and Swales (1907) report heavy flights across Lake Erie from

Point Pelee: “During September it has always been one of the most

abundant birds of the Point. Keays reports a flight in 1901 when he

noted four hundred September 21.” Long Point, which extends well out

from the north shore of Lake Erie, is another favorite crossing place;

here, according to L. L. Snyder (1931), “the flight observed by Mr.

James Savage on September 30, 1930, was very remarkable, individuals

estimated to be from one to two hundred yards apart, forming a

scattered and straggling flock, passed in an almost steady stream

throughout the morning hours.”

Mr. Burns (1903) writes:

In south New Jersey, in the region of the Upper Delaware

Bay, which runs due south, some time in October of every

year the migrating Flickers are found flying north just

previous to and during a northwest storm. At this time the

wind is generally high and the birds fly against it. This

peculiarity of flight affects a large territory extending

inland from the east shore of the bay some fifteen or

twenty miles. While the birds prefer to breast a wind,

it is also probable that they are reluctant to cross the

lower part of the bay during such a storm which would

tend to drive them seaward, rather preferring to return

northward to the more narrow river where they could cross

in comparative safety.

_Winter._--Winter finds most of the flickers gone from the northern

States and southern Canada. Most of the birds wintering in New England

seek the milder climate of the seacoast, where they feed in the

extensive bayberry patches and on the semidormant insect life in the

rows of drift seaweed along the beaches. The few that remain inland

during mild winters are usually to be found in sheltered hollows or

along the sunny sides of the woods, feeding on the ground or on what

berries and dry fruits still remain on the bushes, often in company

with merry little winter parties of juncos, tree sparrows, chickadees,

nuthatches, and perhaps a downy or hairy woodpecker. Favorite resorts

at that season are the southern slopes of the hills overgrown with

thick stands of red cedars, mixed with staghorn sumacs, barberries,

and other berry-bearing bushes. They probably seek shelter at night in

the dense cedar swamps or in the holes excavated for that purpose in

icehouses or other buildings, or in hollow trees.

L. H. Walkinshaw, of Battle Creek, Mich., writes to me that there, “in

deep winter, flickers can be found in the deep tamarack swamps, coming

to the edge during periods of the day. They often flush, even when snow

is deep, from mounds on the ground or from dead or dying stubs along

the border.”

O. A. Stevens says in his notes: “At my farm home in Kansas, the

flickers caused some annoyance by seeking entrance to the barn for

winter nights. They enlarged other openings for this purpose and

sometimes started openings which would not lead them inside. One bird

at least, enlarged the opening about the hayfork track and roosted on

the iron track just inside the door.”

Dr. Paul L. Errington (1936) writes an interesting story on the

winter-killing of flickers in central Iowa. By a careful study of

the droppings of the three birds that he studied, it appeared that

they were much weakened by improper food, too large a proportion of

indigestible seeds, mainly those of the sumac, and not enough animal

food, which ordinarily amounts to more than half of the average food

supply.

M. P. Skinner (1928), writing of the Sandhills of North Carolina,

says: “Flickers stay in the Sandhills all winter, but the infrequent

snowstorms cause them lots of trouble in finding food. On January

10, 1927, I found quite a little coterie of birds had scratched the

leaves under a dogwood tree until they had a space twelve feet in

diameter more or less cleared of snow. Here, among other species of

birds, were two Flickers foraging among the leaves for fallen dogwood

berries. These berries were probably eaten until weather conditions

became better for insect catching. Even during winter, ants are fairly

plentiful for the Sandhill Flickers, especially on warm days.”

COLAPTES CAFER COLLARIS Vigors

RED-SHAFTED FLICKER

PLATE 37

HABITS

This western representative of our well-known eastern flicker is so

closely related to it and so similar to it in all its habits that

practically all that has been written about the northern flicker

would apply equally well to the red-shafted species. The two differ

strikingly in coloration, but the color pattern is similar in both,

and the fact that they interbreed so freely and extensively where

their ranges come together shows their close relationship. The only

differences in their habitats, nesting, and feeding habits are due to

the differences in environments.

The red-shafted flicker is a wide-ranging species through many types

of open country or sparsely wooded regions, from the Rocky Mountains

to sea level on the Pacific coast. It is a common bird near human

habitations in thinly settled towns and villages and in agricultural

regions, as well as in the wilder foothills and mountain slopes up to

timberline, but not on the treeless plains or deserts. The Weydemeyers

(1928), referring to its haunts in northwestern Montana, give a good

idea of its habitat there, which would doubtless apply equally well

throughout its range elsewhere; they say: “The Flicker is most abundant

about farms and in cut-over woods, nesting commonly near barnyards and

in pastures. An observer will note fewer and fewer individuals as he

passes from cultivated farms into stump-lands; from there to virgin

forests of fir, larch, and yellow pine; thence into the lodgepole pine

and white pine woods of the lower part of the Canadian zone; and onward

into denser forests of alpine fir, spruce, and arborvitae. But he will

find the birds increasing in numbers on the rocky mountain slopes

and upward through the Hudsonian zone, where the species ranges to

timberline.”

Milton P. Skinner says in his Yellowstone Park notes: “This bird is

found at all elevations from the lowest at 5,300 feet to timberline at

9,500 feet, and in practically all kinds of habitat except the largest

opens, and even there I have seen it flying across from side to side.

It is in the sagebrush areas, in the borderland between forest and

open, in detached groves, and even in heavy forest.

“They are often seen on the ground, especially in May, but also in June

and July. Sometimes they are in the road. I have seen them frequently

in the grass and perched on a bowlder or a prostrate log. In addition

to these treeless and brushless localities, I often see flickers on the

ground under sagebrushes and greasewood; on the ground in a grove of

cedars and limber pines; under aspens, willows, cedars, firs and on

the ground amid the stumps of a former fir forest. I have-seen them in

groves of mixed lodgepole pines and aspens and in meadows where there

were only groves of willow bushes.”

_Courtship._--In the same notes Mr. Skinner says: “On April 29, 1915, I

saw a pair of flickers ‘dancing.’ They were on a dead lodgepole, and

although there was not much movement of the feet, the body was bent

from side to side and there was a constant ‘juggling’ or ‘jigging’

motion. The head was tilted back and the bill pointed up at an angle

of sixty degrees, with the neck outstretched. The neck, head, and

bill were in constant motion; the motion of the bill reminded me of a

musical director’s baton. Intervals of rest alternated with periods of

motion; the whole thing lasted perhaps 5 minutes.”

_Nesting._--Major Bendire (1895) says on this subject:

Its favorite nesting sites are old rotten stubs or trees,

such as cottonwoods, willows, sycamores, junipers, oaks,

and pines. It nests also in holes in banks, in the sides of

houses, in gate posts, etc. * * *

Among some peculiar nesting sites of this species the

following deserve mention:

Mr. Walter B. Bryant gives the following: “One of these

was in a bridge bulkhead, a few feet above the Carson

River, Nevada. The interior of the structure was filled

with gravel and large stones, among which the eggs

were deposited. Another pair used a target butt, at a

much-frequented range, as a substitute for a stump. A third

nest was in a sand bank, 3 feet from the top and 10 from

the creek. This hole was apparently specially prepared,

and not one made by a ground squirrel, such holes being

sometimes used by these birds.”

Mr. Charles A. Allen, of Nicasio, Calif., found a pair of

red-shafted flickers nesting in a similar situation in a

creek bank, the burrow containing seven eggs, which he

took. About ten days later, happening to pass the same

spot, he examined the hole again and found it occupied by a

California Screech Owl, which in the meantime had deposited

four eggs. Some two weeks subsequently he examined it for

a third time, and on this occasion the tenant proved to be

a Sparrow Hawk, which was setting on five handsome eggs.

There was no nesting material present on any occasion, the

eggs lying on some loose dirt.

Others have noted the bank-nesting habit of this flicker, which seems

to be rather common. Most of the nests, however, are excavated in

trees or stubs, at heights varying from ground level to 100 feet above

the ground. We found them nesting commonly in the Huachuca Mountains,

Ariz., in the sycamores in the canyons and in the tall pines near the

summits at 9,000 feet. A large majority of the nests will be found

between 8 and 25 feet above the ground. Dawson (1923) mentions a nest

“in a stump only two feet high, and its eggs rested virtually upon

the ground.” Walter P. Taylor (1912) mentions a nest in a cavity in

a haystack, in the desert regions of Humboldt County, Nev., where

there were practically no trees. This flicker also nests frequently in

telegraph and other poles, also far too often in buildings, where it

drills a hole through the outer wall and lays its eggs on a beam or

other flat surface, accumulating enough chips to keep the eggs from

rolling.

Florence A. Merriam Bailey (1896) watched a red-shafted flicker

excavating its nest-hole, of which she says: “The flicker hung with

claws planted in the hole, and with its tail braced at an angle under

it, leaned forward to excavate. Using its feet as a pivot, it gradually

swung in farther and farther; and when it had gone so far that it had

to reach back to throw out its chips, it swung in and out on its feet

like an automatic toy wound up for the performance. When it had been

building for a week, only the tip of its tail protruded from the nest

hole as it worked.”

Mrs. Irene G. Wheelock (1904) says: “The site having been chosen, the

male clings to the surface and marks with his bill a more or less

regular circle in a series of dots, then begins excavating inside this

area, using his bill, not with a sidewise twist, as do many of the

woodpecker family, but striking downwards and prying off the chips as

with a pickaxe. When his mate has rested and wishes to share in the

labor, she calls from a near-by tree and he instantly quits his task.”

Dr. and Mrs. Grinnell (Grinnell, Dixon, and Linsdale, 1930) made the

following observations on this species, while excavating its nest-hole:

The bird entered the hole, entirely out of view, at 8:54,

reappeared from within at 9:05, when it rested a minute

with the head partly out; then it proceeded to bring out

from within load after load of chips, which showered

down as if of fine, almost sawdust-like size. Forty-five

such loads were counted to 9:10, delivered with striking

regularity. Twelve loads delivered were counted in one

sixty-second period. At 9:10 the bird disappeared again

till 9:15, when its head appeared and twenty-seven loads

were flipped out in three minutes; then after a long pause,

till 9:19, the other flicker arrived, with scythe-whetting

note, and both birds flew off. One of them returned at

9:29, flipped out several loads of chips and left at 9:31.

Digging in this particular stump must have been easy and

hence rapid.

_Eggs._--The red-shafted flicker lays five to twelve eggs to a set.

Probably, if the experiment were tried, it would prove to be as

prolific an egg layer as its eastern relative, though I have found no

evidence to that effect. The eggs are indistinguishable from those of

the northern flicker. The measurements of 57 eggs average 28.18 by

21.85 millimeters; the eggs showing the four extremes measure =35.56=

by 20.32, 27.94 by =24.89=, =25.40= by 20.83, and 27.68 by =19.30=

millimeters.

_Young._--Mrs. Wheelock (1904) says of the young: “For nearly three

weeks they are fed by regurgitation, and after that time the insects

brought are masticated by the parents. * * *

“After they are old enough to leave the nursery, they follow their

parents about for nearly two weeks, begging to be fed and gradually

learning to hunt for themselves. This lesson is wisely taught by the

parents, who place the food under a crevice in the bark, in full sight

of the young, who must pick it out or go hungry. The baby cocks his

head wisely, looks at it, and proceeds to pull it out and dine.”

Life histories of North American woodpeckers · 第 35 / 43 段