Bright Beautiful Breeding Baltimore Orioles

(Note: See below for information on the upcoming Eliza Howell nesting birds field trip — June 9, 2018)

Each year in May and June, visitors to Eliza Howell Park are treated to the sight and sound of Baltimore Orioles. The orioles spend the winters in Central America and arrive back in Detroit, with great regularity, during the first week of May. For those who are looking, their colors make them hard to miss.

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Photo by Margaret Weber

They begin to construct their intricately woven nests two to three weeks after the first arrivals. I noted the first Eliza Howell Baltimore Oriole this year on May 4 and saw a pair engaged in nest construction on May 18.

In a typical year, several different pairs nest in the park. From May 18 to May 21 this year, I have already seen 5 different nests under construction.

Most of the work of nest construction is done by the female over a period of 4 – 8 days. The nest is suspended from a twig, usually near the end of a branch. It is a pouch that looks something like a hanging sock. It is about 6 inches long, with a small opening at the top, and a bulging bottom (where the eggs are incubated). It is made of grasses, other plant fibers, and sometimes artificial material like yarn.

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The nest pictured above was made in the park last year, less than 10 feet from the ground. Usually they are much higher, in large leafy, deciduous trees, but not in a forest. Parks like Eliza Howell, with big scattered trees, are ideal spots. Over the years, I have come to know their tree preferences; this cottonwood by the road is definitely one. 

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The nests are easiest to find at this time of the year, during construction, when the bird is making frequent trips with nesting material. Without the bird leading the observer’s eye to the nest, it is very difficult to locate.

The following picture shows an incomplete nest in a typical location, hanging near the end of a branch. When the leaves are fully developed, it will be almost impossible to see from the ground. (This is also in a cottonwood tree.)

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Another good time to find a nest is during feeding time, when the adults (both male and female) make frequent visits to the nest to feed the young.

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Photo by Margaret Weber

Detroit Audubon schedules an annual field trip to Eliza Howell for a guided look at nesting orioles and a number of other nesting species. It is timed for feeding hatchlings time. After the orioles complete the nests and lay the eggs, incubation (by female alone) takes about 12 – 14 days. 

     Detroit Audubon Nesting Songbirds Field Trip

     Saturday, June 9, 8:00 a.m. – approximately 10:00 a.m.

     Everyone is welcome, no cost. Audubon membership not required.

     Meeting location: about halfway around the road loop from the Fenkell entrance

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Photo by Margaret Weber

The orioles are called “Baltimore” because someone was reminded of Lord Baltimore’s yellow and black coat of arms. To me, they look much more orange than yellow. Regardless, they and I will be in the park to welcome everyone on June 9. 

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