Suffice to say that field ornithology has made some major inroads regarding the knowledge of breeding abundance and distribution of Acadians in Ontario since then. The two Ontario Breeding Bird Atlases (1981-85 and 2001-05) as well as concerted field work by various people towards the preparation of status reports and recovery strategies for the species have given a much more complete picture of its Ontario range and abundance. Certainly it is still mostly restricted to the Carolinian Life Zone, especially where there are reasonably large blocks of deciduous forest such as Skunk's Misery in Middlesex County, Kettle Point First Nation to Port Franks area in Lambton County, and especially in Norfolk and the eastern portion of Elgin counties. It is designated an Endangered Species both provincially and federally.
It is still a regular breeding species of Rondeau Provincial Park where there is upwards of 1000 hectares of deciduous forest. In the right conditions in early June, some years it is possible to encounter as many as 8 singing males from the main roads. Who knows how many are back in along the ridges out of ear shot?
This spring, there were at least 4 pairs heard or seen from a road or trail during the breeding season. Three nests were visible from the road, although one right over the road was abandoned before any eggs were laid. I was particularly interested in following the activity of one nest. The previous year there was a pair in the same vicinity, and I am quite certain their energy was put towards raising a single Brown-headed Cowbird! This next image is the only one I got of that nest and it showed a young bird, looking very much like a cowbird.
I watched periodically using the car as a blind. An adult was almost always seen on the nest incubating.