During the Mt. Lebanon Nature Conservancy's 24-hour BioBlitz of Twin Hills Trails Park May 20-21, scientists found 50 species of birds, including nine migrant warblers that traveled from Central and South America, and a nesting Cooper's hawk, according to Christine Phillips, of Phillips Ecological Services.

Tim Pearce, assistant curator of mollusks at the Carnegie Museum of Natural History, found 19 species of snails and slugs, including a Glyphyalinia raderi, a rare snail.

The crew of scientists also found three species of squirrels, including the gray squirrel, red squirrel and fox squirrel.

Crayfish, salamanders, garter snakes and poison hemlock were among the 218 living species identified in the park. The count is still growing as laboratory identification continues, Phillips said.