Invasions are won or lost while they're still small.
Every agency fighting invasive species runs the same playbook, early detection and rapid response, and detection is the weak link. Visual surveys and traps tend to find an invasion once it is large enough to see, when eradication costs far more or is no longer possible. Detection dogs find the egg mass, the larva under the bark and the mussel on the hull while a population is still small enough to remove.
Spotted lanternfly · Asian longhorned beetle · Emerald ash borer · Zebra and quagga mussels · Brown tree snake · Burmese python · Red palm weevil · New World screwworm · Spotted knapweed