There are more than 120 species of butterflies in western Pennsylvania, and the North American Butterfly Association wants ...

Sylvia Garcia took this photo of a Western Tiger Swallowtail butterfly (Papilio rutulus) as it was nectar-feeding on a ...

Jeffery Starn and Jessica Hamel submitted this photo of an Anise Swallowtail (Papilio zelicaon) that was taken during a hike ...

A big part of the work is hiking out to stake sampling plots to get representative counts of the cactus. In that plotting, gardens researchers helped the BLM and others boost the known count of the ...

Mallorca’s Nautical Obstacle This isn’t the only sighting that’s left marine biologists scratching their heads; after more than 300 years, an unbelievable find has been documented on the Serra de ...