Safe and Dangerous Woods
I would like to thank Pat Zaccardi of Feathers & Fun, and she would like to express her appreciation to all of the folks on the following Onelist Groups (Now EGroups): Cockatoos, Conures, and Conurepics.
SAFE & UNSAFE WOOD FOR BIRDS
(updated 10-24-00)
Wash all wood in a bleach solution,
rinse then for small branches bake
in
oven at 250 for about 1 hour and
for large branches wash,
rinse and dry in direct sun.
SAFE
Acacia, Alder, Almond, Apple, Apricot
(*see note below), Arbutus, Ash,
Aspen, Bamboo, Beech, Birch, Bois d'arc (*see note below), Bottle
Brush, Cherry
(*see note below), Citrus, Cork Oak
(*see note below), Cottonwood,
Crabapple, Dogwood, Elm, Eucalyptus
(*see note below), Fig Species,
Fir, Fruitless Mulberry, Ginkgo,
Grape Vines, Grape Palm, Guava,
Hackberry, Hawthorn, Hazelnut,
Hibiscus, Hickory, Horse Apple
(*see note below), Ironwood,
Larch, Lilac, Liquidamber, Madrona,
Magnolia, Manzanita, Maple,
Mediterranean Laurel, Mesquite
(remove thorns), Mimosa, Mulberry,
Nectarine (*see note below),
Norfolk Island Pine, Nut (except
Chestnut & Oak), Oak (wood
only, no bark or leaves), (*see
note below),
Palm, Papaya, Peach (*see note
below) Pear, Pecan, Pine, Plum
(*see note below), Poplar, Prune
(*see note below), Ribbonwood,
Rose, Sassafras, Sequoia (redwood)
(*see note below), Spruce, Sweet
Gum, Sycamore, Thurlow , Tree fern,
Umbrella tree, Vine Maple, Walnut
(Black Walnut may be dangerous),
Willow (Goat, Pussy & Weeping)
A couple of woods appear on safe
lists that shouldn't or should be
noted that there are problems with
some species. Redwood has
long been associated with rashes
and the dust with lung and eye
disorders. It contains high
levels of volatile oils that are
known toxins. Further
exposure is believed to suppress
the immune system.
UNSAFE
Box Elder Wood: UNSAFE
Chinese Popcorn/Chinese
Tallow: UNSAFE
Hemlock: UNSAFE (see note
below)
Sumac: UNSAFE (aka Rhus/Toxicodendron)
Black Locust has been cited as
causing some toxic reactions with
birds, though members of this
species are also known as the
Acacia, which is listed as safe.
Gillian Willis on her website says
"Do not use apricot, cherry,
peach, prune, plum or nectarine.
These trees all belong to the
Prunus species. They contain
cyanogenic glycosides which release
cyanide if ingested.
There is some disagreement over
whether cherry, oak and eucalyptus
are toxic. However the wood should be
safe but avoid the leaves and seeds
and in the case of oak and cherry
the bark as well. (Safety on
Cherry is questionable)
London Tree is in the sycamore
family, and is currently under
research.
Do not give the birds
redwood. The oils the wood
contains are toxic. But the
biggest problem is if they get a
splinter, redwood tends to block
the immune response and they become
infected quite easily. Oak
appears on a number of toxic lists,
primarily because of the tannin in
the leaves and acorns. In the
writer’s opinion this is totally
unjustified, the wood should be
perfectly fine as it is not
generally eaten and contains little
tannin in
most species.
Cork Oak - (again avoid foliage and
acorns) the bark of cork oak is
safe for consumption even by humans
whose tolerance for tannin is much
lower than most bird species.
Cork Oak is a safe wood to leave
the bark on. Cork oak has
very low levels of tannin (far
lower then other oaks) and the bark
is just what the name says
'Cork" Cork Oak is
originally from southern Europe and
is the source of all natural
cork. The bark is very thick
and well, cork like. It can
be found wherever there are old
wine growing areas as it was grown
to provide corks for the
bottles. It is also found
scattered around the southeastern
US and California. Because of
it's very low tannin content it is
safe for use in food storage (the
cork in the wine bottle, oil
bottles, etc.) There is a
similar species found native to
North America, the Prairie Oak a
variety of live oak is found
throughout the great plains and
east to Ohio. It has a very
thick cork like bark, however I do
not know what the safety factor for
this species would be.
Information on the
composition of woods and related
materials can be found in a number
of publications, I don't remember
the names off hand, but any
university that has a good botany
or agronomy department, or your
university agricultural extension
service should be able to direct
you to the appropriate
references. When I was
researching the safe woods for our
birds the Calif State University
Fresno Agricultural Dept was more
than helpful, completely willing to
answer any questions I had and to
help me find the references.
Eucalyptus - while it appears
on many toxic lists I have never
been able to find a good reason for
it being there. The level of
phenols (the toxic elements in
eucalyptus) is lower than in many
pine species which are considered
perfectly safe. While you
might want to avoid the foliage
there doesn't appear to be any
reason to do so. Considering that
many lorikeet and cockatoo species
eat the flowers and new leaves in
the wild, and that it is
the dominant native wood for
Australia concern over it's
toxicity seems exaggerated.
Oak (except Tan Oak which should be
avoided because of the VERY high
tannin content) though there is
some controversy about Oak it
appears that the wood should be
safe. the bark leaves and
especially the acorns have much
higher levels of tannins and should
be avoided. While many bird
species including many parrots
regularly feed on nuts and
vegetation that have levels of
tannin much higher than oaks, it is
unclear how their
bodies deal with the substance and
it is therefore probably advisable
to avoid high doses.
Cherry - this one is really
controversial. there are
confirmed cases of dogs and of
horses having fatal reactions to
eating cherry wood. However I
have been unable to find any
confirmed report of bird
fatalities. Regardless the
sap is what contains the toxic
elements (see Gillians Help pages)
and that is contained primarily in
the Cambium, a layer of material
just below the bark. If
cherry is to be used it should be
dry, debarked and any traces of sap
removed. Under no
circumstances should fresh cherry,
the foliage or bark be given to
birds.
Ginkgo - While the female Ginkgo
may have an unpleasant smell the
wood, bark and foliage all appear
to be safe.
Hemlock - The wood that is sold in
lumber yards (sometimes called Hem
Fir) is safe but the foliage is
toxic. No other species of hemlock
should be considered safe.
Chinese Magnolia - The wood,
foliage and flowers all appear to
be safe, but I have been unable to
confirm this. According to CSUF
biologist and agronomists they
could see no reason to
consider it dangerous (it is not a
known toxic plant) but know of no
reason to consider it completely
safe either.
Cedar occasionally appears on safe
lists. If Cedar is to be
used, Red cedar should be avoided
for the same reasons as
redwood. Yellow and Sitka
Cedar may be safe though.
Laurel appears on most toxic
lists. Most Laurel species
are toxic but the
Mediterranean Laurel is safe.
Distinguishing the species can be
difficult though and unless the
species is known absolutely it
should be avoided.
One plant that deserves mention as
it occasionally appears in gardens
as an exotic ornamental is the
Chinese Snake Tree. This is a
VERY TOXIC plant and even contact
with the sap (through the skin) can
present the risk of fatality to
small animals and children.
It is sometimes called the Lacquer
plant because it was the source of
lacquer.
Also to be avoided is the Pitch
Pine. It was the source
material for turpentine and has
VERY high levels of phenols.
Contact with the wood can cause
rashes and the fumes from burning
it have been known to cause lung
and eye disorders.
Bois d'arc, which is also called
the Horse Apple tree, and this is
in the Mulberry family and is a
safe wood but I had to write a lot
of bird folks.