A bumblebee gathers nectar from a wildflower in Appleton. Maine scientists say the state needs to take a broad census of its bumblebees to ensure the security of its beloved blueberry and cranberry crops, and the state is enlisting its residents to make it possible. The Associated Press / Robert F. Bukaty

Volunteer Shaina Helsel records data after capturing a bumblebee in Gardiner. The Associated Press / Robert F. Bukaty

Shaina Helsel prepares to capture a bumblebee in a field in Togus. The Associated Press / Robert F. Bukaty

A rented hive of bumblebees sits in a blueberry field in Appleton. The Associated Press / Robert F. Bukaty

A collection of bumblebees is pinned to a board for identification in Togus. The Associated Press / Robert F. Bukaty

Blueberries like these ripening in Appleton are largely dependent on bees for pollination. The Associated Press / Robert F. Bukaty