Sliding Into Summer With the Wrens

The year has been going quickly. On the cusp of Memorial Day the daffodils and very early blooming flowers in my garden are long done. When I pushed down the daffodil foliage I exposed the other plants that are now growing thanks to all the rain we've had lately - butterfly weed, liriope, purple coneflower, sedum. The azaleas bloomed nicely, as did the hellebore. The flowers on both are fading but the foliage is growing. 

(Margo D. Beller)

The rhododendron (above) is now flowering the best I've ever seen it and all of the potted cannas are growing lush foliage behind the protective enclosures used to thwart the deer.

The migrant birds I had heard in my yard are mainly gone now, taking advantage of the north wind lessening to go elsewhere. I can still hear plenty of birds during the day but they are no longer setting territory, they are quietly building their nests and creating the next generation of birds.

One of those birds is what is now known as the northern house wren.

(Margo D. Beller)

Sometime in mid-April - unfortunately I did not note the day - after reading reports house wrens had returned to my area from their wintering grounds to the south, I hung the wren box (above) in the dogwood tree. I was hoping to draw a breeding pair for another year.

On Monday, April 21 - which I noted - a house wren was singing from the locust tree in the front yard closest to the driveway. I had taken out the garbage pail so the bird was over my head. I knew to start watching for action.

Nothing happened for three days. Then, on April 24, I saw a pair of house wrens investigating the nest box. They looked inside and outside it like any couple investigating a prospective residence. Then they left. It did not take long before they started bringing nesting material - twigs - to the box. 

The activity brought a pair of house sparrows to the dogwood. Sparrows will nest in anything - any opening in a street light, for instance - and they will also try to take a nest away from another bird, in this case a house wren.

The wooden nest box was made with a small opening to let in a house wren and keep out a bigger bird like a house sparrow. After a few attempts, plus my going outside to chase them off, they stopped bothering the box. That is when the nest building began in earnest.

After my husband and I returned from a family visit the second weekend in May I sat on my porch and watched the nest box. I noticed the male would sing from a nearby shrub. The female would come out of the box. Was she sitting on eggs? Very likely. To me the wren call was the same as the "this is my territory" call but apparently the female heard something different. He would call, she would fly out to get food and then return to the box. 

A few days later I noticed she was making more trips out of the box and then flying back with food. If the Cornell bird people are right about the timing, the eggs likely hatched. Mom would fly in with food, then maybe brood her young if it was cold out. Sometimes the male flew to the box and gave the female food, presumably to feed a chick. He would fly to another branch in the dogwood or a nearby shrub and sing, presumably letting his mate know he was watching for predators.

One of the parent wrens, as photographed from
my porch chair through a screen.
(Margo D. Beller)

House wrens are tough little birds when it comes to protecting their territory. When another house wren was in the yard it was quickly chased off. When a gray squirrel climbed the dogwood looking for something to eat, the male wren flew at it, pricking the much bigger animal with its sharp bill. The squirrel left in a hurry. The wren chased off any downy woodpecker using the tree as a staging area before flying to the suet feeder. (I've since put all the feeders away.)

Some birds it left alone because they have no interest in baby birds - the yard robins and catbirds, which flew to the dogwood to scan the lawn for something to eat or bring back to nearby nests. The wren would fly to a nearby branch and watch until the larger bird left. Then the wren flew off.

Today I noticed from the porch that both parents were bringing food and going into the box to feed a chick. When they left they would take a small amount of poop to keep the nest free of bacteria. At this point the young - two or three chicks, I'm guessing - are still small. In the next two weeks the baby birds will get so big their parents won't be able to get into the box. These birds will be hungry and loudly begging when a parent arrives. The chicks will jostle each other to get to the front and grab the meal. If a chick can't fend for itself it will die.

The nesting period is 15-17 days, according to Cornell. That means at some point in the next 10 days or so, likely when I'm not on the porch watching, the male will call to the young and draw them out. One day the young are squawking in the box as usual, the next I can tell by the silence the birds have flown. Maybe for a few days I will hear the young begging for food as they follow one or the other parent around the fringes of the yard. Then they will be gone, maybe to start their own broods. The parents will go their separate ways, unless they decide to have a second brood in the nest box. At the end of the summer the birds will face the perils of flying south again.

When hot, humid summer comes I try not to do much in the garden aside from the necessary weeding. The perennial flowers and shrubs I planted will take care of themselves with little assistance from me until it is time to cut them back for the winter. 

At this point I will acknowledge that, once again, another year is ending and take the nest box out of the dogwood.