Mushrooms could start popping any day, but it's not too early to scout out your search sites. Went out looking for mushrooms today and didn't see any, but it is much easier to spot the recently dead Elms through the rest of the trees right now before everything starts leafing out. Mature Elms often have a Y shaped fork two thirds of the way up the height of the tree and if they are starting to lose their bark, the white underwood is clearly visible right now through the rest of the trees. Here's a link that shows the basic Y shape of a mature Elm, sawtoothed edge and shape of the leaf and also an image of the rough crisscrossing bark. http://www.mushroomexpert.com/plischke_01.html Make a mental note of where they're at and you can go right to your dead Elms when the mushrooms do start popping. When most trees die they start to lose their bark after 1-2 years, by 5 years the bark has usually completely fallen off. Morchella (Morel) mushrooms usually favor 2-4 year dead Elms where the bark is still in the process of falling off.