Great Kiskadee in Louisiana - Range Expansion Question

I saw a pair of Great Kiskadee in south-central Louisiana today at White Lake Wetland Conservation Area. This pair has been here for at least a few years and it looks like they were gathering nest material this morning. This species is considered rare in Louisiana but with increasing sightings in the last few years. Is this species expanding its range like other southern birds such as the Limpkin and Black-bellied Whistling Duck?