June 10, 2018 – A small number of migrating Black terns have been reported recently at the Black Oak Bayou of the LaSalle Fish & Wildlife Area adjacent to the Kankakee river in Newton County Indiana. The Black terns could be seen flying low over the water as they hunt. With their silver wings spread wide they gracefully swooped from side to side, at times stopping to hover. The small terns would stretch their neck as they would look down towards the water to focus on the movement of a potential prey while their aerodynamic skills kept them suspended in one place. They would take insects off the water or out of the air or from a protruding limb of a submerged snag with remarkable precision.
They would glide with the sun to their back slowly working their way from east to west over the glimmering sparkles of the shallow waters of the bayou. Suddenly with a decision only they understood they would swiftly turn and fly quickly back toward the east and start over with their slow and methodical hunting technique which would repeat many times before they would find a small tree stump barely showing just above the water line to perch and rest a short time before the next hunt. The drainage of wetlands along with dangerous agricultural chemical runoff have had significant negative impacts on the nesting areas of the Black tern. Loss of migratory wetlands from drainage and pollution has added to a steep decline of the North American population of Black tern along with many other species. Overfishing of the Black terns coastal tropical winter range is also believed to have contributed to the somewhat sharp decline of this species.