Add Yahoo as a preferred source to see more of our stories on Google. A black swallowtail butterfly lands on a plant in a garden. - Darrell Gulin/Getty Images If you want a garden filled with ...

When one species is genetically similar to another species, their populations can often be mistaken for one and the same. This is exactly what has happened with Papilio solstitius, a tiger swallowtail ...

This May has been overly cloudy and so I’ve wondered whether common signs of spring, such as the first leaves to appear or the first flowers to bloom, have been late because of the gloomy weather?