Purple Martin roosts

Purple Martin roosts are now forming in a number of areas in the Unites States. Roost behavior at the largest sites can be observed on NEXRAD. Since many Wisconsin birds are still at nesting sites, it may be a few weeks before any are forming here. But if you see what you think is a roost, you can learn more and report it at the PMCA Project Martin Roost site, here. Remember that PUMA is an early fall migrant, with most birds gone from Wisconsin before September.