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attracting
wildlife
butterflies and other pollinators
pollinators
are organisms which aid in the transfer of pollen to allow for the fertilization
of plants essential to fruit and seed production. While some plants,
such as grasses, have very light pollen which can be transferred by
wind, about 80% of flowering plants are dependant on pollinators to
help them transfer their pollen.
A pollinator
goes to a flower seeking nectar and in the process pollen from the male
part of the flower sticks to the pollinator's legs or other parts of
its body. When it flies on to another flower of the same type, the pollen
is deposited on the female part of the plant. This allows the plant
to reproduce by creating seeds and fruit.
When people
think of pollination, many focus on bees. Bees are the principal pollinators,
but there are other important pollinators as well. These include other
insects such as flies, moths, butterflies, wasps, and even some beetles.
They also include hummingbirds and bats.
the
importance of pollinators | threats to pollinators
| creating a pollinators' paradise | a
diversity of pollinators
the
importance of pollinators
Many
of the foods we eat could not be produced without pollinators. Apples,
blueberries, grapes, watermelon, carrots, squash, cocoa, cotton, cherries,
and peaches are just a few examples of the crops which are dependent
on pollinators for their production. Many wildflowers also rely on pollinators.
Without their services we would not be able to grow the majority of
our food crops or enjoy the flowers around us.
threats
to pollinators
Many of the pollinators we depend on are under threat. Some crops are
showing decreases in production due to a shortage of pollinators. Farmers
are having to import and raise pollinators to ensure good production
of their crops.
The main
threat facing pollinators is loss of their habitat. Expanding urbanization
is eating up the habitat of many of these creatures. As native vegetation
is replaced by exotic garden plants, large expanses of lawn, and roadways,
pollinators lose the resources that are necessary for their survival.
The loss of milkweed from many areas, for example, threatens the monarch
butterfly which will only lay its eggs on this plant.
Pesticides
are also taking their toll. Insecticides aimed at pest species also
kill off the pollinators necessary to the crop's production. Herbicides
deplete the landscape of "weeds" essential to the pollinator's survival.
This is especially true for butterflies which are dependant on many
"weed" species for the survival of their larvae or caterpillars. The
Monarch butterfly, for example, is unable to survive without the presence
of milkweed.
We can
help ease this pressure and create a pollinators' paradise with some
thoughtful gardening and a little planning.
creating
a pollinators' paradise
To welcome pollinators to your garden consider the
following tips:
- Plant
a diversity of blooms to meet the needs of a diversity of pollinators.
- Pick
a sunny, preferably sheltered spot.
- If
you don't have a large yard try putting out a few container
plants to attract passing pollinators.
- Choose
native flowers that are abundant in nectar and pollen. (Exotic flowers
are typically bred for showiness and may not yield nectar and pollen).
- Plant
for a spectrum of blooming times to provide food for pollinators from
spring through to fall.
- Shrubs
and trees, such as dogwood, blueberry, cherry, plum, willow, and poplar
will provide pollen or nectar, or both, early in the season when food
is scarce.
- Satisfy
the thirst of pollinators in the hot dry summer by providing water
in a shallow dish, bowl, or birdbath, with half-submerged stones as
perches.
- A muddy
spot, which can be created using the trickle
effect, will provide essential nutrients to butterflies
and nesting materials to many bees.
- To meet
shelter requirements, allow a corner of your yard to go "wild" with
grasses, weeds, native wildflowers, and brush.
- Leave
an area of bare, sandy soil for bees which nest underground.
- Make
nesting structures for smaller bees out of bundles of drinking straws
or woody stems hung in a tree. For larger bees make a bee
bungalow.
- Pesticides
are a pollinator's worst enemy. If absolutely necessary, apply only
organic pesticides sparingly and selectively, after sundown when most
pollinators are inactive.
- There's lots you can do to attract hummingbirds. Learn more here.
a
diversity of pollinators
To attract a variety of pollinators, consider their different preferences:
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Pollinator
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Preference
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Pollinating
beetles (such as long-horned and soldier beetles)
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Wide-open
flowers, including goldenrod, asters, sunflowers, and butterfly
weed, which allow easy access to their pollen, are preferred.
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Hover
flies and small bees
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Because
of their short tongues, they prefer packed clusters of tiny flowers.
Plant such flowers as marigold, coneflower, daisy, butterfly weed,
and aromatic herbs to meet their pollinating needs.
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Large
bees, moths, and most butterflies
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Since
bees and most butterflies can't see the colour red, they prefer
blooms of other hues, including dogbane, asters, goldenrod, fleabane,
red clover, marigold, and globethistle. However, they are drawn
to some red flowers, such as bee balm, that reflect ultraviolet
light.
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Hummingbirds
and white and swallowtail butterflies
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Because
of their longer tongues, they tend to favour trumpet- or bell-shaped
flowers. They are attracted to red flowers, including honeysuckle,
salvia, day lilies, primrose, blazing star, jewelweed, fireweed,
wild geranium, phlox, and cardinal flower.
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All
butterflies
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Butterflies
have the added requirement of food sources for their larvae and
places to lay their eggs and pupate. Milkweed, clover, violets,
asters, lupines, black-eyed Susan, and sedum are favourites. They
are also happy with trees such as birches, aspen, willow, hackberry,
cherry, and oak.
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