I just saw this message, not having been on the forum for more than a week. Re Kate Wallace from DR, try looking at
http://todytours.com/. I birded together with her and another guide from DR in Guadeloupe last week and they are good!
For Dominica, there is a couple of options: rent a car or hire the best local opportunity, Bertrand Jno Baptiste. If you want to see as much as possible, I would encourage you to contact Bertrand, send me a PM for his E-mail. If you will take your chances and go alone, the Syndicate area is the best IMHO; however, my success rate in seeing the Imperial parrot is only about 1 in 10 (much better when I have been with Bertrand, he seems to have a magical way of finding at least one). There are plenty of reports on the web describing the access to the Syndicate area, for example in Blake's trip report repository. Briefly, from the main road running N-S along the west coast, turn up the access road, which is well sign posted and found between Dublanc and Portsmouth. If you can find the place to buy it, you should bring a site pass. Along the lower half of the access road, red-legged thrush is quite common but easiest to see in low light situations like after sunset. The road is paved, narrow and winding, so take care with the driving. The road ends in the visitor center, but there is a sign earlier showing the entrance to the Nature trail. Follow the trail from that sign keeping right, and go to the overlook at the sign to the right. This used to be "outlook 1", I scarcely bather with the others. The overlook shows a nice forested hillside on the other side of the Picard river, with possibilities of seeing both parrots, lesser antillean swift, etc. Continuing along the nature trail, it will go paralel with the river for a while; after you have turned left, away from the river, you will eventually have the option of going right or straight, I mostly go right and end up at the visitor center, ending with following the paved road back to the sign. The forest here holds most of the sought after species, including e.g., ruddy quail-dove. The walk along the paved road back to the initial sign often gives more Jaco (red-necked parrots) than the overlook, as well as some open-land birds. Driving back a little, there is a trail for Mont Diablotin. The lower parts of this trail is a beautiful rainforest, and the place where forest thrush often have been most easy for me. Parrots are most active morning and afternoon, around noon is not all that great. I feel that Jaco is guaranteed in this area, Sisserou (imperial parrot) as I said is much more hit and miss.
Another place worth mentioning is Cabrits natl park in Portsmouth. After paying your dues, walk up the stone-pawed access to the old stone wall and into the grassy area. Right there, you may find the tropical mockingbird singing. Follow the right edge of the clearing, choose the trail in the far righthand corner and follow this trail to the end. turn right, and a little later turn left where a sign says battery and the left-hand fork goes down the hill towards the northern side of the peninsula. This is a good route for e.g., Elaenia, plumbeous warbler, etc. Last time I was there, a mangrove cuckoo was in show off mood.
HTH
Niels
