But the cameras captured little more than tiny specks against a bright sky.
And that was when an unusual sighting became something much more mysterious.
As more people began talking about what they had seen, the descriptions started to overlap. Different witnesses recalled a huge wingspan, slow and effortless movement, and a strange silence as the creature passed overhead.
Some said it barely appeared to flap its wings.
Others remembered the enormous shadow crossing the ground beneath it.
For a few moments, the Rio Grande Valley seemed to have witnessed something that shouldn’t have been there.
And then it disappeared.
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It Was the Shadow That People Remembered
Long after the mysterious bird was gone, many witnesses said they remembered the shadow more clearly than the animal itself.
Imagine standing outside on an ordinary afternoon