I often feel that new words come to me at the exact right moment. This fall, I had one of those moments of synchronicity, when I began to see the word "irruption" in various places - a word that until then was unfamiliar to me. (Rather than “eruption” like a volcano, "irruption" is spelled with an i and two rs.) Typically used in conjunction with the word "event," an irruption event describes birds that move southward when there is a shortage of food in their home range.