In 2007 while looking for a place to camp while doing field work near Zion National Park I came across notes in a field notebook about "Mosquito Cove". It appeared to be either BLM land or private land that was open to the public for camping. Nestled against SR-9 on the north along the Virgin River on the south and between Virgin and Sprigndale, the flats were in the floodplain, surrounded by cottonwood and willow the riparian habitat was amazing. The sand washed clearing here made for great camping, and there could easily be 50 to 100 campers here on busy weekends--especially holidays. I've camped here at various times of the year and always found it to be dead during the weeks. But in 2011 a large flood came through the area and ever since the gate has been closed the unofficial "campground" here is closed now. I think a combination of people treating the land terribly (litter and refuse), and the danger presented from being i the flood plain weren't worth the risk so the state decided to lock it down. Which is a shame because it really was some great camping--and birding.
Although I've only submitted 6 checklists from Mosquito Cove, I probably camped here 10 to 15 times over 3 to 4 years. Exactly 34 species have been reported, and I've managed to see all of them in my combined trips--it helps that all the lists form others happened to be there with me ;) There are several species found here regularly during the breeding season that were fairly easy to find. Notably SUMMER TANAGER was a sure thing. BLUE GROSBEAK, ASH-THROATED FLYCATCHER, LUCY'S WARBLER, CASSIN'S KIGBIRD, and HOODED ORIOLE were all found as well, along with a throng of other riparian migrants and breeders. PLUMBEOUS VIREO, LESSER GOLDFINCH, and SPOTTED TOWHEE are often present and easy to track down. Migrant wise WESTERN TANAGER, WILSON'S WARBLER, and WESTERN WOOD-PEWEE can all be found. Occasionally BUSHTIT make their way through the area, while various waterfowl might be seen flying past on the river--notably COMMON MERGANSER. You can still bird the area from the road, but I don't know how much luck you will have.
From La Verkin, take SR-9 east bound 11.4 miles till you reach the road on your right that dead ends at the fence..