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HAWAII INVASIVE SPECIES COUNCIL
In 1917, botanist Joseph Rock introduced albizia to Hawai‘i for reforestation. Now it has infested thousands of acres in O‘ahu and eastern Hawai‘i Island- In 2002, a Maryland angler caught a fish unlike anything he had seen before. The discovery sparked panic, inspired horror movies and the snakehead species became one of America's most notorious invasive fish
- In 1905, Hawaii introduced mosquitofish to fight mosquitoes. More than 100 years later, the fish is threatening native wildlife
- Hurricane Lala ravages Hawaii: 130,000 without power, homes swept away as floods riseNearly 130,000 utility customers lost electricity after Hurricane Lala weakened. Flooded roads and damaged homes created dangerous travel c...17 Aug, 2026, 04.57 PM IST
- How a mosquitofish brought in to kill mosquito larvae became major freshwater ecosystem problemA fish introduced to Hawaii over a century ago now threatens native freshwater wildlife. The mosquitofish, brought to control mosquitoes, n...17 Aug, 2026, 11.34 AM IST
- In 1976, a Pulitzer-winning poet moved from New York to Maui; he helped turn 19 degraded acres into a rare palm forestPoet W.S. Merwin dedicated over forty years to transforming degraded land in Maui into a thriving palm forest alongside his wife Paula. Tog...15 Aug, 2026, 02.50 PM IST
- In the 1980s, Pablo Escobar brought 4 hippos to Colombia. Today, they have become the world's largest invasive hippo populationPablo Escobar's four imported hippos have spawned Colombia's largest invasive population, disrupting local ecosystems. These robust animals...14 Aug, 2026, 10.22 PM IST
- Since 1997, Florida has released Australian insects to help control melaleuca in the Everglades; its invaded range has shrunk by nearly 75% alongside herbicide and mechanical removalIn Florida's Everglades, Australian insects played a crucial role in curbing the spread of invasive melaleuca trees. By targeting these tre...14 Aug, 2026, 04.20 PM IST
- In the 1930s, just 9 to 20 foreign ant queens apparently stowed away on a ship; their descendants now infest more than 367 million U.S. acresA few fire ant queens arriving in Mobile, Alabama, in the 1930s established a widespread infestation. These invasive insects now infest ove...14 Aug, 2026, 03.30 PM IST
- In the 1500s, European settlers brought pigs to North America as travelling food; more than 6 million feral swine now occupy at least 35 statesEuropean pigs introduced centuries ago became invasive feral swine across North America. These adaptable animals now inhabit diverse enviro...14 Aug, 2026, 03.20 PM IST
- In 1955, Hawaiʻi released a predatory snail to control giant African snails; it climbed into native forests and helped wipe out rare tree snailsIn Hawaii, the introduction of the rosy wolfsnail was intended to combat a pest, but it drastically backfired. Instead of targeting its int...14 Aug, 2026, 03.10 PM IST
- The hidden owl war: An invasive owl is conquering ancient forests, putting the threatened northern spotted owl at even greater riskInvasive barred owls are occupying ancient forests vital for northern spotted owls. These aggressive competitors concentrate in the exact h...13 Aug, 2026, 10.20 PM IST
- In 1884, Louisiana displayed South American water hyacinth for its lavender flowers; within decades, floating mats covered 126,000 Florida acres and blocked waterwaysOriginating in 1884, water hyacinth transformed into a significant nuisance for Florida by the 1950s. This aggressive floating plant overto...13 Aug, 2026, 04.10 PM IST
- In 1920, Washington planted 507 Norway maples along 16th Street to honor its war dead; the invasive species later spread into Rock Creek ParkIn 1920, Washington DC planted Norway maples as a tribute to World War I veterans. Initially seen as a living memorial, these trees became ...13 Aug, 2026, 04.00 PM IST
- In the early 1970s, Maui planted miconia for its spectacular purple leaves; its descendants spread across East Maui and threatened native forest watershedsIntroduced to Maui in the 1970s, Miconia calvescens, known as the velvet tree, has emerged as a significant invasive species. Its swift spr...13 Aug, 2026, 03.50 PM IST
- In the 1860s, America introduced burning bush as an ornamental; birds later helped spread it into forests across 21 invaded statesThe burning bush, native to Asia, became well-liked for its vibrant autumn hues. Birds transport its seeds, helping it escape confined land...13 Aug, 2026, 03.40 PM IST
- In the early 1900s, Hawaiʻi imported a thorny European shrub to feed sheep and fence pastures; it now forms 6-foot walls that fuel fires and sprout againGorse, introduced to Hawai'i around 1900 for sheep fodder and fences, has become a persistent invasive problem. This spiny shrub thrives in...13 Aug, 2026, 03.00 PM IST
- In the 1800s, Americans planted tamarisk for windbreaks and erosion control; by 2005, the tree had spread across western river systems and become a major management concernTamarisk was originally brought in for various practical applications, but it has since proliferated across western waterways. This invasiv...11 Aug, 2026, 05.14 PM IST
- 150 years ago, Britishers brought a South American tree to stop desertification in Thar, now it has become a thorny issue in IndiaVilayati babul, introduced during colonial times, remains a subject of ongoing debate. This invasive tree provided fuelwood and livelihoods...30 Jul, 2026, 09.39 AM IST
- From a 1937 garden planting to an ecological crisis: One Miconia tree now spreads 8.9 million seeds, endangering Queensland's iconic rainforestsToday, a single mature Miconia tree can produce over 8.9 million seeds in one season. What began as a 1937 garden introduction in tahiti ha...26 Jul, 2026, 12.00 AM IST
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