Record 8 fledged chicks for Louisiana’s wild ‘whoopers’

Sep 8, 2022, 12:23 AM | Updated: 4:00 pm
FILE - A keeper wearing a "crane suit," to resemble a parent whooping crane, feeds a recently born ...

FILE - A keeper wearing a "crane suit," to resemble a parent whooping crane, feeds a recently born chick at the Audubon Nature Institute's Species Survival Center in New Orleans, on June 21, 2018. A record eight whooping crane chicks have taken wing in Louisiana after hatching in the wild. It’s not just a record for fledglings of the world's rarest crane in Louisiana, but for any flock of the endangered birds reintroduced to the wild, the state Department of Wildlife and Fisheries said Thursday, Sept. 8, 2022. (AP Photo/Gerald Herbert, File)

(AP Photo/Gerald Herbert, File)

NEW ORLEANS (AP) — A record eight whooping crane chicks have taken wing in Louisiana after hatching in the wild. It’s not just a state record for fledglings of the world’s rarest crane, but one for any flock reintroduced to the wild to help save the endangered birds, the state Department of Wildlife and Fisheries said Thursday.

“That is very exciting. We’re absolutely thrilled that the Louisiana program has done so phenomenally well,” said Anne Lacy, senior manager for North America programs at the International Crane Foundation in Baraboo, Wisconsin.

The previous record was set in 2018, when six wild-hatched birds fledged in the flock that was taught to migrate between Wisconsin and Florida by following ultralight aircraft, Louisiana wildlilfe biologist Sara Zimorski said in an email. That also was Louisiana’s previous record wild fledgling year, at five.

The brown-and-white juveniles which survive to adulthood will be white with red caps and black mustaches and wingtips, and about 5 feet (1.5 meters) tall. Their wingspan can reach 7 feet (2.1 meters) across.

Only about 800 “whoopers” exist, according to the crane foundation. About 500 are in the only natural flock, which winters in Texas and breeds in Alberta, Canada. About 80 are in the Wisconsin-Florida flock, nearly 140 in captivity and seven in an introduced flock that failed in Florida.

Louisiana’s flock now totals 76, said a news release from Wildlife and Fisheries.

Three males and three females raised at the Audubon Nature Institute’s species survival center in New Orleans will join them in November, said assistant curator Richard Dunn.

A fourth female will remain at Audubon for breeding to be sure her good genes meet up with a good match, Dunn said. That’s important because every crane alive is descended from 15 that lived in Texas in 1941. Biologists estimate there were more than 10,000 before habitat loss and overhunting nearly killed them off.

The Louisiana and Wisconsin-Florida flocks are being nurtured in hope of creating a cushion in case anything happens to the natural flock.

Two of the 14 or 15 birds hatched in Wisconsin’s wilds this year will survive to fledging and a third, which broke a wing, is being kept for captive breeding, Lacy said.

She said the foundation just released two yearlings that were raised at the Calgary zoo but couldn’t be sent to Wisconsin last year because of COVID-19 precautions. Seven bred in captivity are to be released later this year.

The Texas-Canada flock is listed as endangered, though the U.S. Fish and Wildlife Service is considering whether to change that to threatened. The “experimental” flocks are classified as threatened because that loosens regulations, making reintroductions more feasible.

“We can’t point out exactly why this was our best year” for fledglings, Zimorski said in the news release. Experience may have played a part — only one of 17 nesting pairs were first-timers, and that pair’s chicks didn’t survive, she wrote in an email.

“Three pairs that had nested unsuccessfully in previous years hatched and fledged chicks this year,” she wrote.

Zimorski said dry conditions during the breeding season, from February until June, may also have played a part.

“I don’t think we’ve had a nesting season during a drought like we had this year,” Zimorski said in the news release. “Intuitively it doesn’t seem like that would be good, but according to some colleagues from the U.S. Fish and Wildlife Service, other species of water birds often have really good breeding success in drought years that follow wet years, which we definitely had last year.”

Last year, 24 pairs mated for what was then a record 14 hatchlings in Louisiana, but only four grew old enough to fly.

Biologists don’t know the sex of this year’s fledglings or those of two birds that hatched last year. The others are 38 males and 28 females.

Whooping cranes mate for life.

“A few birds that nested in 2021 lost their mate and though I think most of them were repaired they didn’t nest with their new mates,” Zimorski said in an email. “Additionally, there were a couple of pairs that nested in 2021 who are still alive and together but just didn’t nest this year.”

Federal and state agencies began Louisiana’s reintroduction in 2011; the first chick hatched in 2016.

This year was the second in a row and the third since 2016 that twins both fledged, the department said. Whooping cranes lay one or two eggs per nest, but generally only one grows up even if two hatch.

___

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Record 8 fledged chicks for Louisiana’s wild ‘whoopers’