Gulf oil spill: Latest satellite photo shows Louisiana landfall
Lower swampy reaches of the Mississippi River also have confirmed presence of oil, and a blob of the oil plume appears to be drifting west of the river's mouth, toward Port Fourchon in Lafourche Parish.
Grand Isle State Park is in the vicinity of that break-off patch of oil. The island is the most popular of the state's barrier islands and is a jumping-off point for deep-sea fishing. There are some 230 species of fish there, as well as numerous species of birds, including the pelican, state bird of Louisiana.