Help advance science and conservation of butterflies

From the rarest butterflies to the most common, your sightings contribute to conservation decisions, scientific knowledge, education, and more. Help us understand when and where butterflies occur. All you have to do is watch and report your butterfly sightings.

LATEST NEWS view all


Red Admirals Streaming Northward

Right now, hundreds of thousands, perhaps millions, of butterflies are arriving with spring in the temperate zones of North America. No, they’re not Monarchs. These are Red Admirals, and about every decade or so, there’s a massive migration northward from somewhere south. It’s one of the many great migrations that often go unnoticed.


Latest Updates Ready and Many More on the Way!

    A new butterflying season brings not just flowers but also a fresh version of our platform. You might have already noticed some small changes around the site, like the new “Identifiers” statistic on the homepage. This feature highlights the many users who help identify observations – we’ve got a whopping 2,831 active identifiers […]


Mariposas of the Dominican Republic

In this Post, Peter Hall recounts his experience observing butterflies in the Dominican Republic during the northern winter. Without renting a car, he explored the Samaná Peninsula on foot from a small hotel in Las Galeras. During his week there, he identified 48 butterfly species, including endemics from the island of Hispaniola. He highlights the presence of species such as Calisto and various skippers. Additionally, he mentions sighting rare and endemic species like the Haitian V-mark Skipper and the Dynamine butterfly. He also shares findings about the distributions of some species and the consulted literary sources.