Follow Along During Migration!
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Like BSBO on Facebook and follow on Instagram for daily updates and photos from our Navarre Marsh Banding during spring and fall migration. And visit the BSBO Bird Bander's Blog for more detailed information.
All banding, marking, and sampling is being conducted under a federally authorized Bird Banding Permit issued by the U.S. Geological Survey’s BBL. |
Reports (updated weekly during migration)
*Numbers presented during the season are initial and don't take effort into account*
Last Updated 6/3/2025
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Last Updated 11/4/2025
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To better follow along during migration and compare to previous years, the number of birds banded in fall 2025 are graphed every banding day. 2025 is the number of birds banded each banding day. 2024 is the number of birds banded on the same date in fall 2024. And Average is the average number of birds banded on the same date based on every previous fall season. These numbers do not take effort into account and are for general comparisons.
To better follow along during migration and compare to previous years, the number of birds banded in fall 2025 are graphed every banding day with effort taken into account.* 2025 is the number of birds banded each banding day. 2024 is the number of birds banded on the same date in fall 2024. And Average is the average number of birds banded on the same date based on every previous fall season.
*While the Daily Banding Totals and Daily Birds/Net Hour graphs are mostly similar, with effort taken into account, this graph is a truer reflection of the banding totals and bird activity. Effort consists of the number of nets operated and how long they were open for (one net open for one hour equals one net hour). Effort taken into account is especially important when comparing between years or stations. On a given day, two stations may band 100 birds each over five hours. If one station operates 10 nets and the other operates 25 nets, their birds/net hour (birds banded divided by total net hours) will be 2 and 0.8, respectively. So, while the same number of birds were banded at each station, it took the station with more nets more effort to catch the same number of birds (or, it took less effort by the station with fewer nets).
*While the Daily Banding Totals and Daily Birds/Net Hour graphs are mostly similar, with effort taken into account, this graph is a truer reflection of the banding totals and bird activity. Effort consists of the number of nets operated and how long they were open for (one net open for one hour equals one net hour). Effort taken into account is especially important when comparing between years or stations. On a given day, two stations may band 100 birds each over five hours. If one station operates 10 nets and the other operates 25 nets, their birds/net hour (birds banded divided by total net hours) will be 2 and 0.8, respectively. So, while the same number of birds were banded at each station, it took the station with more nets more effort to catch the same number of birds (or, it took less effort by the station with fewer nets).
To better follow along during migration and compare to previous years, the number of birds banded in fall 2025 are summed every banding day. 2025 is the cumulative number of birds banded this fall by date. 2024 is the cumulative number of birds banded in fall 2024 on the same date.
Species numbers are added to daily during the season, with the top ten changing as the season progresses. 2025 is the current number of birds banded thus far in the season. 2024 is the total number of that species banded in fall 2024. And Average is the average number of that species banded during the fall season. These numbers do not take effort into account and are for general comparisons. For a breakdown of all species, high records, first and last capture, and highest capture date, click the 2025 Fall Weekly Banding Totals at the top of the page.
Return birds are those that are captured and already have a band, but were not banded in the current season (they were banded in a previous season or year and are returning). This table displays species captured this season with return individuals, the number of individuals, and the season/year those individuals were originally banded in.
Recoveries are birds that have been banded at one location and are then encountered again (or recovered) at a different location. Since birds have high site fidelity (the tendency to return to the same location) most banded birds that are recaptured are captured at the original banding site. But occasionally a recovery occurs (either by another bander or the general public)(which is remarkable given the relative minute size of a banding station compared to the immensely vast landscape). This table presents birds either banded at BSBO's Navarre Marsh Banding Station and their recovery location, or birds banded at other sites and recovered at Navarre in fall 2025. If you find a banded bird (either the bird itself or through photography) and can read its number, please report it to the Bird Banding Laboratory - the federal administrator of bird banding projects in the US.