We had a cold day a few days ago where we had the wood stove going, and due to the warmth in the house, a long-horned mason bee emerged out of one of our pieces of wood. It was too cold to put him outside, so I put him in a jar with a mesh lid and gave him a Q-tip soaked in sugar water, which he gladly drank from. He spent the night in the house, and then when it warmed up the next day, I released him. I found the log with the nest in it and pulled it out of the pile destined for the fire so the females, along with any more males, can hatch a little later in the spring.