Oriole builds nest; construction goes quickly

Photo by Chris Bosak A Baltimore oriole builds a nest at Presque Isle State Park, Erie, Pa., May 2025.

Baltimore orioles have one of the most unique nests of all the songbirds in New England.

According to allaboutbirds.org, “Baltimore Orioles build remarkable, sock-like hanging nests, woven together from slender fibers. The female weaves the nest, usually 3 to 4 inches deep, with a small opening, 2 to 3 inches wide, on top and a bulging bottom chamber, 3 to 4 inches across, where her eggs will rest. She anchors her nest high in a tree, first hanging long fibers over a small branch, then poking and darting her bill in and out to tangle the hank. While no knots are deliberately tied, soon the random poking has made knots and tangles, and the female brings more fibers to extend, close, and finally line the nest. Construction materials can include grass, strips of grapevine bark, wool, and horsehair, as well as artificial fibers such as cellophane, twine, or fishing line. Females often recycle fibers from an old nest to build a new one. Males occasionally bring nesting material, but don’t help with the weaving. Building the nest takes about a week, but windy or rainy weather may push this as long as 15 days. The nest is built in three stages: first, the female weaves an outer bowl of flexible fibers to provide support. Next, springy fibers are woven into an inner bowl, which maintains the bag-like shape of the nest. Finally, she adds a soft lining of downy fibers and feathers to cushion the eggs and young.”

During my recent trip to Presque Isle State Park in Erie, Pa., I came across an oriole pair building a nest. We saw tons of orioles overall, but this was the only nest I found under construction. I was amazed at how much progress the orioles made in just one day. The first photo below was taken on a Sunday and next two photos (and the one above) were taken on a Monday. Nature is amazing.

Click here to see photos of sandhill cranes at Presque Isle.

Photo by Chris Bosak A Baltimore oriole builds a nest at Presque Isle State Park, Erie, Pa., May 2025.
Photo by Chris Bosak A Baltimore oriole builds a nest at Presque Isle State Park, Erie, Pa., May 2025.
Photo by Chris Bosak A Baltimore oriole builds a nest at Presque Isle State Park, Erie, Pa., May 2025.

State of the Birds rings some alarms

Below is the press release (without edits or opinion from me) for the 2025 U.S. State of the Birds report. Commentary will come in a later post. …

The release of the 2025 U.S. State of the Birds report was announced today (Thursday, March 13, 2025) at the 90th annual North American Wildlife and Natural Resources Conference in Louisville, Kentucky. The report, produced by a coalition of leading science and conservation organizations, reveals continued widespread declines in American bird populations across all mainland and marine habitats, with 229 species requiring urgent conservation action. The report comes five years after the landmark 2019 study that documented the loss of 3 billion birds in North America over 50 years.

Key findings from the new report show that more than one-third of U.S. bird species are of high or moderate conservation concern, including 112 Tipping Point species that have lost more than 50% of their populations in the last 50 years. That includes 42 red-alert species facing perilously low populations, such as Allen’s Hummingbird, Tricolored Blackbird, and Saltmarsh Sparrow—birds that are at risk without immediate intervention. 

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