The warm weather late last week and the several inches of rain that followed have left the farm fields of the lower Susquehanna valley a soggy muddy mess…waterlogged. Runoff has made its way down the tributaries to raise the waters of the river and fill up its banks.
Migrating gulls find it difficult to locate food when the Susquehanna becomes a silty turbid torrent. It’s not at all unusual to find hundreds of them enjoying a feast of earthworms in the agricultural uplands when conditions such as these exist. As you may have guessed, the birds alluded to are the familiar Ring-billed Gulls, the same species seen mooching french fries and other snacks in fast-food restaurant parking lots. They are by far the most common inland gull in eastern North America.
Ring-billed Gulls are notorious for loafing and feeding in flocks which seldom include other species of gulls. They are frequently the smallest gull found in their inland habitats, so it is understandable that they may avoid the company of the larger and often more aggressive species.
However, today I was reminded that one must be ever vigilant and check for other species among those flocks presumed to consist solely of Ring-billed Gulls, particularly during times when the river is so inhospitable to passing migrants.