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YELLOW FLAG IRIS INVASIVE SPECIES
In 1848, California nursery operators brought pampas grass to Santa Barbara; it spread across the state, and one stand can release millions of seeds each yearPampas grass made its debut in California in 1848, admired for its striking appearance as an ornamental plant. However, its vigorous reprod...- America brought yellow flag iris in for gardens; it escaped into wetlands, reached more than 40 states, and now congests water flow while crowding out native plantsThe yellow flag iris, first brought to North America in the 1800s, quickly evolved from an ornamental plant to a widespread ecological thre...
- Researchers removed invasive Japanese stiltgrass from 8 Indiana forest sites; native plant diversity rose 24%, while herbicide-treated plots had 123% greater tree seedling density than controlsThe spread of Japanese stiltgrass across eastern forests poses a significant threat to the diversity of native plants. Research indicates t...
- In 1921, America introduced cogongrass as a forage crop; later used for soil control, the invasive grass now covers more than 1 million acres in FloridaCogongrass was brought to the United States in the early 20th century with the noble goal of supporting agriculture and curbing erosion. Ho...
- In 2002, black rats were eradicated from Hawaii's Mokoliʻi islet; after just one shearwater chick survived from 1999 to 2001, 126 fledged in 2002 and 185 in 2003Mokoliʻi was once severely impacted by invasive black rats, which posed major risks to seabird species. In 2002, after dedicated conservati...
- Siberian elm was widely planted in America for windbreaks and as a disease-tolerant shade tree; it escaped cultivation and is now considered invasive in 41 statesSiberian elm, initially introduced to American landscapes for its Dutch elm disease resistance, soon proved problematic as it became invasi...
- Amur honeysuckle arrived in America as an ornamental shrub; it later became a major invasive concern in forests across the northern United StatesIntroduced over a century ago, Amur honeysuckle quickly spread across the United States as an ornamental plant, but its aggressive growth h...
- In the 1940s, a California landowner released about three dozen zoo deer at Point Reyes for hunting; by 2002, the two non-native herds had grown to roughly 1,100 animalsPoint Reyes National Seashore grapples with the ecological fallout from non-native deer species that were introduced in the 1940s. These de...
- San Francisco Bay cut invasive cordgrass by nearly 98%; native Ridgway’s rails then expanded into 4 former salt ponds as restored marsh habitat returnedThe San Francisco Bay has seen remarkable advancements in wetland restoration, benefiting the Ridgway's rail population significantly. Whil...
- San Francisco Bay cut invasive cordgrass by more than 97%; native Ridgway’s rails later expanded into restored former salt ponds as marsh habitat returnedIn a promising turn of events, restoration efforts in San Francisco Bay have notably decreased invasive cordgrass numbers, allowing the Rid...
- In 1998, an Iowa couple bought land to restore a lost landscape; 25 years later, it became home to hundreds of plant and wildlife speciesJim grew up on a dairy farm, and spent much of his childhood outdoors. He studies natural sciences teaching and earned a master's degree in...
- Florida pays up to $30 an hour to hunt Burmese pythons; contractors also get bonuses for bigger snakesFlorida is incentivising contractors to help combat the invasive Burmese python population through a conservation program offering hourly w...
- California cleared invasive plants from three Camp Pendleton breeding areas; willow flycatchers resettled at those sites within 5–7 yearsIn 2023, a lone Southwestern Willow Flycatcher was spotted at Marine Corps Base Camp Pendleton, a notable event after an absence since 2012...
- Arizona removed invasive bullfrogs and rebuilt native frog habitat; Chiricahua leopard frog breeding sites grew from 7 in 2013 to 19 by 2019Efforts to revive the Chiricahua leopard frog habitat in Southeastern Arizona encountered severe obstacles. The introduction of invasive Am...
- Florida researchers used 90 robotic rabbits to catch Burmese pythons. What happened next even scientists couldn't believeResearchers in Florida's Everglades have turned to creativity in their fight against invasive Burmese pythons by designing robotic rabbits....
- Italy eradicated black rats from Zannone in 2007; nine years later, Scopoli's shearwater nesting pairs had nearly tripled from 27 to 80 on the Mediterranean islandZannone, a volcanic island near Rome, successfully removed black rats that threatened local seabird populations. Conservationists undertook...
- On rat-free D’Arros Island, scientists counted 2,768 wedge-tailed shearwater pairs in 2016, nearly 10 times the 2009 estimateD'Arros Island in Seychelles has witnessed a remarkable revival of wedge-tailed shearwaters after the successful elimination of invasive ra...
- After Klein Curaçao removed goats and feral cats and restored habitat, nesting birds climbed from 140 pairs of one species in 2002 to around 650 across multiple species in 2022 as eight more species began breedingKlein Curaçao experienced a significant increase in seabird populations after removing invasive goats and cats. The island went from a few ...
- After invasive rodents were cleared from Surprise Island in 2005, three monitored seabird populations grew two to tenfold in the years that followedFollowing the eradication of invasive rats in 2005, Surprise Island in New Caledonia witnessed remarkable growth in its seabird populations...
- A mystery donor quietly bought a 7,600-hectare Scottish estate for 17.5 million pounds. Then handed it to conservationistsThrough a remarkable anonymous donation, Scottish Wildlife Trust has acquired the Inverbroom estate in north-west Scotland. This estate is ...
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