First Aerial Inventory Flight of 2025 Season – August 27, 2025

We got up in the air for the first fall waterfowl flight of 2025 on Wednesday, August 27th. We’ll call this week zero since we’re about a week ahead of schedule, earlier than we typically start the flights. There was interest among the lab and our partners in seeing what abundances looked like during the […]

Last day of duck season

We flew the waterfowl survey on Tuesday, December 22nd. 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 […]

Back in the air

We made it back into the air on Tuesday, December 15th 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 […]

Happy Thanksgiving!

Well Happy Thanksgiving to everyone! We completed the survey on Monday, November 23rd. Duck numbers on the Illinois River dropped slightly (7%) from the November 17th count. We estimated ~397,000 ducks this week, which is still 37% above average for Thanksgiving. Most noteworthy were the number of greater white-fronted geese at Chautauqua NWR (10,000) and […]

Still lots of ducks

We had a great day for the waterfowl survey on Tuesday, November 17th. The winds weren’t excessive, and we even had some cloud cover part of the day. I prefer to fly with some cloud cover because the direct sunshine and the sun’s reflection off the water aren’t blinding me on overcast days. I know […]

Shifting ducks, similar numbers

We had to tweak the waterfowl survey a bit this week because my pilot, Mike Cruce, had prior commitments later in the week. In addition, we also had to avoid the rain event moving through the Upper Midwest on Tuesday, and the excessive winds gusting to 26+ mph on Sunday and Monday afternoons. Due to […]

Forbes Biological Station
20003 N CR 1770E
Havana, IL 62644
217-332-DUCK (3825)
Log In