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Figure
1. The Northern flicker is well adapted
for life on tree surfaces. Special adaptations include
(1) a strong, chisel like bill to hack into bark and wood;
(2) a thick skull that can withstand the pounding; (3)
long, strong toes with curved nails that can grab bark;
(4) stiff tail feathers that prop the birds up while they
are climbing or pounding; and (5) a very long, extendable
tongue with a barbed tip.
(Photo by Jim Pruske.) |
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| Northern
Flickers (Woodpeckers) |
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Of the 11 species
of woodpeckers (including sapsuckers) that live in Washington, the
Northern flicker (Colaptes auratus, Fig. 1) is probably
the most commonly seen and heard. Previously known as the red-shafted
flicker, the Northern flicker has a conspicuous white rump patch
and salmon-colored wing undersides that are distinctly visible during
its slow, bouncy flight. Flickers can also be identified by their
loud call that sounds like wake-up, wake-up, wake-up; also a piercing,
sharply descending peeahr.
Any annoyance
these woodpeckers may cause for homeowners is greatly outweighed
by the large number of insect pests they eat, and the number of
homes they create for other wildlife.
Facts
about Northern Flickers
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| Figure
2. A woodpecker’s tongue retracted (left) and extended
(right). The exceptionally long tongue wraps around the skull
and is anchored at the base of the bill. The tip of the tongue
is barbed to help extract insects from holes, and the tongue
is coated with sticky saliva. A pileated woodpecker is shown
here. (Drawing by Jenifer Rees.) |
Food and
Feeding Habits
- Northern
flickers commonly feed on the ground, searching for ants and
beetle larvae
- While
flickers eat tree-dwelling and wood-boring insects, they also
will eat berries, fruits, nuts, and seeds.
- When searching
for insects, flickers tap on wooden surfaces and look and listen
for insect movements. If they see or hear an insect, they will
continue chiseling until the insects are caught. Hollow sounds
also may indicate that insects are present, thus encouraging
flickers to continue chiseling away.
- Flickers
are attracted to suet feeders, especially in winter.
Nest Sites
and Shelter
- Northern
flickers excavate nest sites in dead or dying trees, aging utility
poles, fence posts, and house siding. They will also use specially
designed nest boxes.
- The birds
use their stout beaks to chisel down 6-18 inches, making a wide
bottom for the egg chamber (Fig. 3).
- Nest holes
may be started but never completed, possibly due to poor location
or quality of the wood. Occasionally flickers will re-use a
nest hole after doing some minor work to it.
- Both male
and female flickers excavate the nest, the male doing substantially
more than the female. Complete excavation may take only a few
days in soft wood, but averages 14 days.
- Eggs are
laid on wood chips created during excavation of the nest.
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Figure
3. Northern flickers will tunnel down 6 to 18 inches in
a nest tree, making a wide bottom for the egg chamber.
(Oregon Department of Fish and Wildlife.) |
Reproduction
- The breeding
season for Northern flickers is from March to June, with young
leaving the nest as late as mid-July.
- Both male
and female flickers incubate the 5 to 8 eggs for about 11 days,
then brood the newly hatched young for about 4 days.
- Both sexes
feed the young, which leave the nest after 24 to 27 days.
- The parents
continue to feed the young once they fledge, and soon the young
begin to follow the adults to foraging sites and gather their
own food.
- Individual
flickers return to the same area to breed year after year.
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| Figure
4. Head-bobbing is the most common visual display of flickers,
and is accompanied by a call. (From Stokes, A
Guide to Bird Behavior.) |
Viewing
Northern Flickers
Where and
When to see: Flickers are usually found in areas dominated by
trees; they also occur in treeless areas where utility poles,
wood-sided homes, and other structures substitute for trees. They
are often seen hopping on lawns where they catch ants and other
insects with their sticky tongues. Winter is a good time to watch
flickers; with the leaves off many trees, the birds are more easily
seen.
What to look
for: Flickers can be recognized by their undulating flight—wings
flapping as the bird flies up and wings folded on the way down.
Signs of roosting, nesting, and feeding sites are likely to be
seen in wooded areas where there are old, large trees that have
some dead or rotting wood on them. Look for fresh wood chips on
the ground below an excavation site. A popular feeding tree is
obvious because of the number of holes in it. Flickers use various
visual displays, including head-weaving and body-bobbing, during
courtship and as signs of aggression toward intruders (Fig. 4).
The most
active displaying occurs early in the breeding season, before
nest-building, when the birds are pairing and there is competition
for mates.
If you offer
suet at your feeder, flickers may become regular visitors.
Attracting
Flickers to Your Property |
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| Figure
5. Suet or peanut butter can be placed in feeder holes
that are one inch in diameter and one inch deep. Attach
a tree limb to a lightweight skillet using outdoor wood
screws and a threaded bolt. (From Link,
Landscaping for Wildlife in the Pacific Northwest.
Feeder design by Ken Short.) |
When managing
space for flickers around your property, the most important
thing to do is to protect undisturbed wooded areas, particularly
those that contain dead or dying trees. While larger trees
may be more suitable housing, small trees rot faster and quickly
attract insects that flickers eat.
Provided
they don’t pose a hazard of falling on people, pets,
or houses, leave any such trees for “woodpecker watching”
whenever you can.
Other
things you can do include:
- Install
a suet feeder in winter (Fig. 5). Suet can be obtained neatly
packaged from stores that cater to the bird-feeding public,
and at farm supply centers and hardware stores.
- Install
a nest box that is specially designed for flickers (see
WDFW’s Nest Boxes for Birds for information).
- Avoid
using pesticides, especially insecticides.
- Leave
ant colonies for flickers to find and harvest. (An Oregon
biologist found over 2,000 ants in the stomachs of flickers.)
- Leave
some fruit on orchard trees for flickers to eat in late
summer, fall, and winter.
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Preventing
Conflicts
Flickers
that have been crowded out of their wooded territories will readily
use alternative structures for drumming, seeking food, or excavating
a cavity. So the flicker that awakens you in the spring, drumming
loudly on a gutter or metal flashing, is making good use of the
habitat you are providing. For this reason, don’t remove
dead or decaying trees in the hope of driving flickers away. That
makes it more likely they may investigate your house for food
or a nest site.
The following
are descriptions of flicker activities and suggestions for ways
to remedy problems. Success will depend on timing, the availability
of food and shelter, and the woodpecker’s previous exposure
to the tactics suggested below. The homeowner will have to weigh
the trouble and expense of control against the scope of the damage
caused by the bird or birds.
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| Figure
6. Scare the flicker away from a drumming site by hanging
strips of Mylar scare tape or aluminum pie pans or floating
Mylar party balloons in front of the area of activity. (Drawing
by Jenifer Rees.) |
1) Drumming:
A flicker drums to communicate with a mate or to proclaim
its territory and attract a mate. This typically happens during
the breeding season (mid March to June), but may continue into
July. For reasons that are not fully understood, drumming may
also occur for a short time in the fall.
Drumming
is the most common reason for flickers to use buildings, and while
it may be annoying, the bird’s activity usually does not
penetrate completely through wood siding.
Flickers
will return year after year to the same house because it works
for them; they attract a mate this way. Thus, a flicker that has
been using the same location for several years will be hard to
move.
To discourage
drumming, try a combination of the following strategies:
Scare the
flicker by hanging strips of Mylar scare tape or floating Mylar
party balloons in front of the area of activity (Fig. 6). When
using scare tape, strengthen each strip by attaching a piece of
duct tape or nylon packing tape to each end. Tack or nail one
end to the outer end of the roof soffit, just under the gutter,
and attach the other end to the side of the house. Before attaching
the bottom, twist the tape 6 to 7 times and keep the tape loose
enough to provide some slack. The slack and twisting are necessary
to produce the shimmering effect. Apply these tape strands at
parallel intervals of 2 to 3 feet.
You can also
try hanging aluminum pie pans horizontally along a rope or section
of twine (Fig. 6). Run one end of the rope to a convenient window
and fasten it to an object inside the house. Whenever you hear
drumming, jerk on the string to make the pans move.
Some people
have had success with stapling large rubber spiders in the vicinity
of the drumming birds. Large, black rubber spiders are available
from most party stores. The Birds Away Attack Spider® is vibration/sound
activated and will respond to the drumming of woodpeckers, by
dropping down on a “web” cord. Batteries then retract
the spider back up the cord, where it waits for the next unsuspecting
woodpecker to arrive.
Scaring the
flicker by shouting and banging pans outside a nearby window may
provide temporary relief. A squirt of water with a garden hose
can have a similar effect. Again, flickers living in urban areas
likely will have grown accustomed to such noises and activity,
and the results will be short lived. (Note: Scaring flickers
away from a nest containing eggs or young is illegal.)
Create a
barrier by covering or wrapping the gutter, down-spout, or other
drumming site with a sheet, tarp, burlap, or other material. A
large area of siding can be protected by hanging a sheet, tarp,
or bird netting from the roof gutter or eave (Fig. 7). Be sure
to cover any ledges or cracks the bird uses as a foothold while
drumming. If you cannot fasten the material to the gutter or eave,
attach it to a board that has been temporarily fastened along
the top of the wall.
If a single
board on the house serves as a toehold, heavy monofilament fishing
line or stainless steel wire can be tightly stretched approximately
2 inches above the landing site to prevent the flicker from perching.
Repel flickers
by applying a commercially available, nontoxic woodpecker-protective
coating spray where activity is taking place. The spray exudes
an aromatic and taste deterrent when pecked.
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| Figure
7. Prevent flickers from accessing the side of a house by
creating a barrier with a sheet, tarp, burlap, birdnetting,
or other material. (Drawing by Jenifer Rees.)
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A note on
where to get materials: Mylar scare tape, Mylar scare balloons,
bird netting, and woodpecker repellents are available from farm
supply centers, nurseries, and on the Web (search for “bird
control supplies.”) Some pest-control companies sell heavier
netting with a larger mesh than common bird netting used to protect
fruit. Such netting is not as likely to create problems for small
songbirds, which sometimes get caught in the smaller mesh.
2) Seeking
Food: Flickers inspect tree trunks and branches for wood-boring
beetles and other insects throughout the year. If a flicker pecking
is not restricted to one location on your house, and if it occurs
any time of year, the bird is probably gathering insects, or their
eggs or larva. Physical evidence of this behavior includes soft
pecking in straight lines that result in dime-sized holes.
Once they
have established a feeding pattern on a house, flickers can be
very persistent, and the holes they create may serve as visual
attractants to other flickers. So, it is important the get them
to stop as soon as possible.
Note that
the flickers may be doing you a favor by drawing attention to
an insect infestation. As a temporary measure, you can create
a barrier between the bird and food source by using one of the
techniques described earlier.
For the long
term, you’ll need to control the insects if you have an
infestation, and then make any necessary repairs or modifications
with wood filler, caulk, or other materials. You may want to consult
a licensed pest-control operator on how to remove the insects
and eliminate future infestations.
3) Excavating
a Nest or Roost Site: If you find a round opening about the
same width as the flicker in the siding or other boards, the woodpecker
is probably excavating a cavity to nest or roost in. Often the
birds pull out insulation from between the walls and there may
be evidence of this below the new hole.
In the spring
or early summer, assume there is an active nest with eggs or chicks
inside. Scaring flickers away from an active nest is illegal.
So, after the young birds have left the nest (generally by mid-June),
immediately seal the opening to prevent starlings, house sparrows,
squirrels, or other animals from using the cavity.
If a flicker
has nested or attempted to nest in a wall, you might consider
providing a nest box specially designed for a flicker as an alternative
nest site. Flickers commonly use nest boxes. A nesting flicker
may defend its territory and keep other flickers away.
Public
Health Concerns
Northern flickers
are not considered to be a significant source of any infectious
disease transmittable to humans or domestic animals.
Legal
Status
The Federal
Migratory Bird Treaty Act protects Northern flickers. A state
permit and federal permit can be obtained to use lethal means
to control flickers when extreme damage is occurring on private
property. Such permits are only granted after all other nonlethal
control techniques have proven unsuccessful. Contact your local
Fish and Wildlife office for permit information.
Additional
Information
Books
Ehrlich, Paul
R., et al. The Birder’s Handbook: A Field Guide to the
Natural History of North American Birds. New York: Simon &
Schuster, 1988.
Nehls, Harry
B. Familiar Birds of the Northwest: Covering Birds Commonly
found in Oregon, Washington, Idaho, Northern California, and Western
Canada. Portland, OR: Audubon Society of Portland, 1989.
Morse, Robert
W., et al. Birds of the Puget Sound Region. R.W. Morse
Company, 2003.
Peterson,
Roger Tory. A Field Guide to Western Birds. Boston: Houghton
Mifflin, 2001.
Stokes, Donald
W., and Lillian. A Guide to Bird Behavior. Volumes 1-3,
Boston MA: Little, Brown, Stokes Nature Guides, 1979, 1983, and
1989.
Urvardy, Miklos
D. F. Audubon Society Field Guide to North American Birds—Western
Region. New York; Alfred A. Knopf, 1977.
Internet
Resources
Prevention
and Control of Wildlife Damage
Seattle
Audubon’s Birds of Washington State
Managing
Small Woodlands for Cavity Nesting Birds
Wildlife
Control Supplies
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