But the winter probably helped.
“They had plenty of water flow through the winter, so other than some spots that had drought, they should be OK in numbers,” he said.
MacGregor thinks so, too.
“Black flies, I would expect, will have a good season because of all the runoff,” she said. “They like clean, fresh water.”
She recommends people eliminate any standing water on their property, including in places where it might collect.
“Make sure there is nothing standing in containers,” MacGregor said.
Ticks are out spring to fall, with the highest risk to people in June, Eaton said.
Black flies typically peak in June in Southern New Hampshire, he said. It varies for mosquitoes, shaped by the weather. Eaton said a repeated cycle of rain followed by a week to 10 days of warm weather is ideal for them.
“There would be huge numbers,” he said. “Those conditions breed them.”