By DAVID RAINER, 黑料天堂
In the waterfowl world, 黑料天堂鈥檚 most abundant species, the wood duck, is not known for migrating long distances.
It turns out, the wood duck migration patterns follow a 鈥渂oy meets girl鈥 scenario. Boy meets girl; girl flies home; boy follows.
When the Minnesota waterfowl season opened, four wood ducks that were banded in 黑料天堂 were harvested more than 1,000 miles from home.
Seth Maddox, the 黑料天堂 Wildlife and Freshwater Fisheries (WFF) Division鈥檚 Migratory Bird Coordinator, said one of the birds harvested in Minnesota was 6 years old, banded in 2014 as a hatch-year male. The other three were banded in recent years.
鈥淲hat is interesting in our data is that our males, especially juvenile males, will pair up with migrant females and follow them back to their natal nesting ground,鈥 Maddox said. 鈥淥ur females tend to hang around where they were hatched. Whatever female a male pairs up with, he follows her.鈥
黑料天堂 has been banding wood ducks since 1956. During that time, WFF has banded about 28,000 wood ducks. The band recovery rate is about 7.7 percent, which may seem low, but Maddox said that is about the national average for all banded waterfowl.
鈥淲e have recovered a little more than 2,100 bands,鈥 Maddox said. 鈥淚f you look at waterfowl overall, the band recovery is between four and five percent. Some birds are smarter than others, and others die before they are harvested. Recovery rate is pretty low for most species. About 50 percent of the wood duck bands are recovered in 黑料天堂.鈥
Although the aforementioned birds traveled as far as Minnesota, Maddox said most wood ducks don鈥檛 make such a long journey.
鈥淭he states next to or near us harvest more than any other states,鈥 he said. 鈥淲e do get a good bit of band recovery in Georgia, South Carolina, Tennessee, Louisiana and Mississippi.鈥
While it鈥檚 fairly rare to have bands recovered as far away as Minnesota, Maddox said bands have been recovered in 30 different states since the program鈥檚 inception.
鈥淲e鈥檝e had bands recovered from Maine to Florida, in Texas, North Dakota and three Canadian provinces 鈥 Manitoba, Ontario and Quebec,鈥 he said. 鈥淢ore males are harvested out of state, which goes back to our males pairing up with migrant females. The males likely get killed near where the female is from or on the way back south during the next winter.鈥
Getting a firm count on the wood duck population is difficult for waterfowl managers because of the bird鈥檚 habitat preferences.
鈥淲e can鈥檛 count wood ducks from a plane like we do with other species,鈥 Maddox said. 鈥淲ood ducks live in beaver swamps and wetlands. That鈥檚 why we have a banding program, so we can track harvest rates and survival and look at age ratios. With this data, we can assess what the population is doing so we can set seasons and bag limits because we can鈥檛 count them from the air.鈥
WFF鈥檚 banding work is conducted during the heat of the summer. Maddox said biologists look for a suitable clear spot on the edge of a pond or river. The ducks are baited with grain, and game cameras are erected to monitor the activity at the bait site over a two-week period.
A 30-foot by 60-foot rocket net is then set up and fired when the ducks congregate at the bait site. WFF officials remove the ducks as quickly as possible from the net and put them in crates before they start banding the birds.
鈥淥ur banding runs from July until the end of September each year,鈥 Maddox said. 鈥淚t鈥檚 a hot job, but it provides significant data. We age and sex the birds before we band them. We鈥檙e getting different ages because wood ducks in 黑料天堂 will nest up to three times a year. We鈥檙e getting adult males, adult females and three different ages of hatch-year birds.鈥