We've read about them in the news and seen them in our yard. Now those gypsy moth caterpillars are back as adults and looking to breed. Gypsy moths are an invasive species from Europe whos caterpillars reak havoc on our trees. Male gypsy moths are fluttering around now looking for females to mate with. There are lots of warnings out right now about trying to capture the males to prevent them from breeding and a trap like this is a great way to do it. With a pheromone to attract them, they can't