"Robotic bird decoys are being deployed at Grand Teton National Park," reports Interesting Engineering, "to influence the behavior of real sage grouse and help restore a declining population.". Robotics mentor Gary Duquette describes the machines as "kind of a Frankenbird." (SFGate shows one of the robot birds charging up with a solar panel... "Recorded breeding calls are played at the scene, with clucking and cooing beginning at 5 a.m. each day.") Duquette builds the birds with a team of high school students, telling WyoFile that at school they "don't really get to experience real-world problems" where failures lurk. So while their robot birds may cost $150 in parts, the practical experience the students get "is priceless." Spikes in the electric currents burned out servo motors as the season of sagebrush serenades loomed, Duquette said. "The kids had to learn the difference between voltage and amperage...." To resolve the problem, the team wired a voltage converter in line with the Arduino controller and other elements on an electronic breadboard. "We pulled through and got it done in time," he said... A noggin fabricated by a 3D printer tops the robo-grouse. Wyoming Game and Fish staffers in Pinedale supplied grouse wings from hunter surveys, and body feathers came from fly-tying supplies at an angling store. Packaging foam from a Hello Fresh meal kit replicates white breast feathers, accented by yellow air sacs... The Independent wonders if more national parks would be visited by robot birds... During this year's breeding season, which runs through mid-May, researchers are using trail cameras to track whether real sage grouse respond to the robotic displays and return to the restored lek sites. If successful, officials say similar robotic systems could eventually be used in other national parks facing wildlife management challenges.

Read more of this story at Slashdot.

An anonymous reader quotes a report from NPR: Women in the U.S. gave birth to roughly 710,000 fewer children last year compared with the nation's peak in 2007, according to preliminary data released (PDF) this week by the Centers for Disease Control and Prevention. Lead researcher Brady Hamilton, a demographer with the CDC's National Center for Health Statistics, said the latest one percent drop in "general fertility" from 2024 to 2025 is part of a long-running downward trend. "Since 2007, there's been a decline in the general fertility rate [in the U.S.] of 23%," Hamilton told NPR. The impact of that change in real numbers is sizable: In 2007, there were 4,316,233 babies born. Last year, even though the nation's population as a whole is larger, there were only 3,606,400 newborns. There's no consensus over why women and couples have shifted their behavior so significantly. Some experts point to economic factors, others say cultural influences, and better access to education and contraception for women are driving the change. "We're seeing big drops in fertility rates for young women, teenagers and women in their 20s," said economist Martha Bailey, head of the California Center for Population Research at the University of California, Los Angeles. "What's not yet clear is whether or not those same women will go on to have children later on." "People are having the number of children they want and that they can afford at a time that makes the most sense for them," she said. "What I don't think anyone is in favor of is a Handmaid's Tale type policy regime, where we're trying to talk families into having children they don't want." One silver lining in the data is the 7% decline in teen pregnancies in 2025. Bianca Allison, pediatrician and associate professor at the University of North Carolina School of Medicine, said: "What is actually affecting the birth rates are likely lower rates of teen pregnancy overall, which is in the context of higher use of contraception and lower sexual activity for youth, and then also continued access to abortion care."

Read more of this story at Slashdot.