Stink bugs make an appearance.
There are two kinds of insects "invading" Massachusetts, the Brown Marmorated Stink Bug and the Western Conifer Seed Bug.
"In general, the majority of what people in Massachusetts are seeing are the Western Conifer Seed Bugs," said Jennifer Forman-Orth, State Plant Pest Survey coordinator of the Massachusetts Department of Agricultural Resources. "We have some confirmed reports of Brown Marmorated Stink Bugs, but people are only seeing one or two at a time. So if someone is reporting dozens or more of `stink bugs,' it is almost certain to be Western Conifer Seed Bug. The Western Conifer Seed Bug is harmless, but can be a nuisance because of its habit of trying to hibernate indoors, often in large numbers. The Brown Marmorated Stink Bug is also harmless to humans, but is considered an agricultural pest, particularly further south - Maryland, Delaware, Pennsylvania - where large numbers of them swarm crops."
The temperature drop is what is bringing the bugs inside.
"Both of these bugs try to hibernate indoors, and both exude a nasty smelling substance when startled, but only the Brown Marmorated Stink Bug is a true stink bug," Forman-Orth said. "The Western Conifer Seed Bug is native to the west coast of the United States, accidentally introduced here in the 1990s, likely through import of lumber. Brown Marmorated Stink Bug is also not native to our state - it is from Asia, and was first found in the United States, in the late 1990s, in Pennsylvania."
"You can often find them resting on the sides of houses, on doors and on window screens, where they are hoping to find a way to sneak in," according to a state blog on the two pests.
The Western Conifer Seed Bug is slimmer than the Brown Marmorated Stink Bug, and has a white zig-zag line across the center of its body. There is also a little "flare" on its back legs.
According to the state blog, if you are having issues with "these or other insects invading your home, the most important thing to do is to ensure any possible points of entry are sealed up. Repair holes in window screens, fill in gaps in window and door frames and cover or remove wall air conditioning units. For heavy infestations, consult a pest management professional."
CUTLINE: The Brown Marmorated Stink Bug (left) and the Western Conifer Seed Bug.