Woodpeckers !
Introduction
Being in NYC, we are strategically placed on the migration route for the common yellow-bellied woodpecker. Also known as sapsuckers - they are on the way to a warmer Georgia for the winter !A few like our city so much - they winter in tiny patches of habitat like Manhattan's Union Square Park !
Description
Yellow-bellied Sapsuckers are fairly small with stout, straight bills – about the size of a Robin. The long wings extend about halfway to the tip of the stiff, pointed tail at rest. Often, they will hold their crown feathers up to form a peak at the back of the head.Sapsuckers are mostly black and white with boldly patterned faces. Both sexes have red foreheads, and males also have red throats. Look for a long white stripe along the folded wing.
Feeding
These birds stand upright on trees, leaning on their tails like other woodpeckers. They feed at sap wells—neat rows of shallow holes they drill in tree bark. They lap up the sugary sap along with any insects that may get caught there. Sapsuckers drum on trees and metal objects in a distinctive stuttering pattern.
Damage
Those sap wells – well here is the issue at hand – some make dozens of holes ! And that is a big problem.For a relatively small tree on a terrace stressed by wind, cold exposure, and confined to a small soil volume – the last thing they need is for something to be poking at them!Sometimes the birds make several rows of holes one under another. The entire area then gets infected from bacteria or funguses eating the dripping sap. Usually that section of bark dies.I have even seen sapsuckers make a series of rows that go all the way around the tree trunk and basically girdle the tree. The entire tree eventually dies.
What can you do
Prepare !In early Fall you should be wrapping the tree trunks of any high sugary sap tree on your terrace. These includes maples and birches. Sapsuckers LOVE Birches! But - any tree is fair game – especially if the trunk is a few feet above the ground.They won’t touch anything too low like shrubs or short 2-3’ tree trunks – always preferring something high above the soil level.The simplest thing to use for wrapping is burlap. You could also use a special tree wrap –unfortunately that is usually chalk white and can become an instant eyesore. Paper also works but it can get wet and droop or tear in the wind. Easy to do - simply wrap whatever you are going to use around the trunk for the entire length of the trunk. Tie it with string or tape to secure it in the wind.You can remove it usually in early December or January. It seems these woodpeckers don’t stop much in NYC on their way back up the eastern seaboard.
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Article written by our Staff Horticulturist, Peter B Morris, BSc, MSc, MBAAll photographs used with permission @SHUTTERSTOCK