Spec as in speculative
I find the idea of organisms evolving to counter humanity very fascinating. Some of these species, such as the Ghost Buckeye and the bloodbark tree, adapted to man's destruction of the environment by being unsettling. Others, like the Luretail viper, lighthouse mimics, siren alligators, sea beaver, and counterfeit mussel, adapted to trick humans.
EDIT: The copper rot and blackhand spider also adapted to specialize in human structures.
EDIT 2: Some clarification on what each species does:
Ghost buckeye's pattern scares off humans
Bloodbark's sap deters loggers
Copper rot feeds on electricity
Lighthouse mimics mimic lighthouses so sailors serve into rocks to avoid the "lighthouse" where the pack can attack (should have clarified this one, sorry)
Luretail viper mimics sound and look of human baby
Juvenile sirens have markings that look like human faces and thrash in water to bait people into coming in to help. Adults have nose protrusions that look like human heads from afar to lure people into a false sense of safety.
Blackhand spiders live beneath furniture and inject paralyzing venom into heels.
Haunting spiders create complex webs that look like ghosts to deter humans
Sea beavers make dams in shapes to lure in sailors so they can harvest the ship wood
Counterfeit mussel has a lure to attract human hands so they can implant larvae in fingers