Lots of migrating birds do travel at about the same time. Sometimes in groups. Here where I am in Indiana the hummers, orioles usually are here by the 24th of April. This year they arrived on the 30th & May 1. I think the storms in the south may have delayed them. Hummingbirds are able to spot feeders up to 2 miles away I think it is. I believe it was Saturday night that was supposed to be a big migration night. I have a friend who follows all that kind of stuff!
