What's in that flock?

Since migrant flocks are starting to fly over, here are the 4 most common species of large birds that travel in flocks in Pennsylvania during the early spring.

Canada Geese

Canada Geese (not canadian, as they are often mistakenly called) are very common, and are the typical species found in "dark" flocks (the other 3 species are primarily white). They often fly in organized Vs.

Snow Geese

Smaller than Canada Geese, Snow Geese appear white with dark wingtips. They stick together in flocks, but are less organized than Canadas.

Tundra Swan

The only swan species that is found in large numbers in PA, these birds are strikingly large and look completely white. Note the extremely long neck.

Ring-billed Gull

In the interior of the state, well over 99% of the gulls you will encounter are this species. Their flight style is completely different from the others listed here, and will often lazily soar. When flapping, they appear much more buoyant than geese and swans. They often travel in large groups, but are typically disorganized.