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Counting ducks from 500 feet above: How a wetland bird ecologist inventories waterfowl

Josh Osborn has a unique job. The Navy veteran turned ecologist leads the waterfowl aerial inventories from the Frank Bellrose Waterfowl Research Center at the Forbes Biological Station in Havana.

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Icing out of the ducks leads Aaron Yetter s final blog of the season off the aerial waterfowl surveys

Credit: Aaron Yetter/Illinois Natural History Survey It’s a bit late, but I think it is important to post Aaron Yetter’s final blog of the season off the weekly aerial waterfowl survey for the Illinois Natural History Survey. As you might guess, building ice truly impacted the survey and makes it the right time to stop for the season. Click here for the listings of aerial surveys by the Illinois Natural History Survey. Keep up with research updates and aerial surveys at the Forbes Biological Station Facebook page. Here is Yetter’s final blog of the season: January 8, 2021 – Aerial Waterfowl Inventory Blog

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Ducks are holding on, according to the INHS aerial survey this week along the Mississippi and Illinois rivers, but major changes are coming with true winter weather arriving

We flew the waterfowl survey on Tuesday, December 22 nd. Coincidentally, this flight was on the last day of Illinois’ central zone duck season. We had noticeable ice on several of the refuges, especially on the northern reaches of both the Illinois and Mississippi rivers. Duck numbers along the Illinois River (249,625) were similar to the previous week and still remained well above average for late December. The central Mississippi River was a different story. Duck numbers dropped (~50%) along the lower Mississippi River from Quincy to Grafton; however, there were still nearly 300,000 ducks along the river this week. We just didn’t see the large concentrations of ducks at Swan Lake (Two Rivers NWR), Long Lake, Cuivre, Batchtown SFWA, Towhead, Delair NWR, or Ted Shanks CA. We are not sure where the ducks went, but they weren’t in their usually spots on the refuges. With the frigid weather arriving over the Christmas holiday, I suspect there will be fewer birds next week.

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Aaron Yetter found strong duck numbers, but also building ice, in his weekly aerial waterfowl survey; and he also captured a scene of a bald eagle parting ducks

We made it back into the air on Tuesday, December 15 th following a couple of nights with temperatures in the low 20’s. Consequently, ice returned to many areas along both rivers. Total duck numbers remained 50% and 43% above average along the Illinois (240,805 ducks) and central Mississippi rivers (554,885 ducks). Mallards were the dominant species encountered and represented 74% of the total ducks along the Illinois River and 60% of total ducks on the Mississippi River. Northern pintail, green-winged teal, and ring-necked ducks were still plentiful in many locations. The North Zone duck season in Illinois was closing as we were conducting the survey, and the Central Zone season will close on December 22

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Aaron Yetter, in the Illinois Natural History Survey s weekly aerial survey, found duck numbers down significantly along the Illinois and Mississippi rivers, though the percentage of mallards remained up

Aaron Yetter, in the Illinois Natural History Survey s weekly aerial survey, found duck numbers down significantly along the Illinois and Mississippi rivers, though the percentage of mallards remained up
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