ISLAND BIRDING: Killing insects with pesticides can also kill our birds
July 29, 2008 · Updated 6:50 PM
Keep a green bough in your heart and the singing bird will come.
On a recent warm, lazy afternoon I sat quietly in my back garden reading.
A soft, high-pitched trill distracted me from my novel and I noticed two cedar waxwings hopping across the lawn. These clay-colored, 7 ¼-inch birds sport a head crest, black Zorro mask and bright yellow tail band. The tips of their secondary flight feathers look as if they’ve been dipped in crimson wax.
My quietude must have been enough of a “green bough” for them to come quite close. They appeared to be plucking something from the recently mowed weeds that we call lawn, which is unusual behavior for cedar waxwings; so I watched them closely.
Waxwings nest late in the year, right about now. Sugary fruits dominate an adult waxwing’s diet, but during the breeding season they collect protein-rich insects to feed their young. The two birds fluttered off into a stand of native Nootka roses, where I presume their nestlings were awaiting a regurgitated meal of insects.
Thank goodness we don’t use chemical pesticides. Just one granule of pesticide can kill a bird. Birds are attracted to the granules mistaking them for food or grit. I certainly wouldn’t want to harm these masked avian bandits.
Countless birds meet their deaths from direct or indirect exposure to landscape and agricultural chemicals. Direct poisoning occurs when a bird consumes a harmful substance or is sprayed. Indirect exposure occurs when a bird ingests an insect that has been poisoned.
Most of us are aware of the amazing comeback of bald eagles after DDT use was banned from agriculture during the mid-1900s. We now see eagles almost daily here on Whidbey Island, and about 50 pairs nest here. Cedar waxwings have also experienced an increase in population during the past 20 years, likely for the same reason.
However, DDT isn’t the only chemical killer.
In one observation in British Columbia, 52 cedar waxwings died and another 27 were partly paralyzed after consuming fruit from a tree sprayed with the chemical parathion.
Not only waxwings are victims of pesticide use. Robins, thrushes and other fruit-eating birds, as well as the hundreds of species of insect-eaters including swallows, flycatchers and most all breeding songbirds are harmed.
The problem is compounded during breeding season when fruit and seed-eating bird species search out insects to feed their young. Most all baby songbirds are in jeopardy when pesticides are used near their nesting habitats.
If you’ve given up using pesticides on your home gardens, you might not think this discussion pertains to you. However, I invite you to consider your food-buying habits; I certainly had to.
How “green” is the green bough in our hearts?
If the food we consume was raised by an agribusiness that employs vast amounts of pesticides, wild birds likely have
First, their habitat is often destroyed to develop large monoculture farms. Next, the birds’ insect food may be depleted with pesticides. And finally, the birds themselves may have been directly or indirectly poisoned.
The good news is that we have a local alternative to consuming food based on pesticide-supported farming practices: Our farmers markets. There are Saturday, Sunday and Wednesday markets right here on Whidbey.
Buying certified organic produce is by far the safest purchase for our own health as well as the well-being of wild birds. Some local farmers practice pesticide-free farming, but haven’t been certified as organic.
And some local farmers do use herbicides or pesticides. Ask about farming practices, and particularly pesticide use, before you buy.
As I mentioned in my last article, my husband and I are thinking deeply about where are food-buying dollars are going. We are exploring local sources of dairy products, meats, grains and veggies. Our new flock of laying hens has just begun supplying us with fresh brown eggs.
We are struggling to make sound choices and are definitely slackers in many areas, but the more I learn about organic gardening methods and the benefit to ourselves, the growers and wildlife, the more convinced I am that we must support pesticide-free growing practices.
As far as I know, the insects in my back garden are toxin-free and I expect that soon I’ll see a healthy family of cedar waxwings following their parents across our lawn.
As the Chinese proverb says, if we “keep a green bough,” then the singing birds — waxwings included — will come.
Frances Wood can be reached at firstname.lastname@example.org.