Without knowing the distance, apparent size cannot reliably be converted into actual size.

This is why scientists generally place much more weight on photographs with recognizable scale, physical specimens, measurements, or repeated observations by trained observers.

Without those things, a reported ten-foot wingspan remains an estimate—not a measurement.

Heat, Light, and Distance Can Transform a Silhouette

South Texas can also present challenging viewing conditions.

Heat shimmer near the ground can distort distant objects.

Bright sunlight can create strong silhouettes.

Clouds, haze, and atmospheric conditions can alter contrast.

When a bird is seen against the sun, its feathers and body markings may disappear entirely.

The viewer may see only the outer shape of the wings.

That silhouette can then become the foundation for an interpretation.

A familiar bird suddenly looks unfamiliar.

A familiar bird viewed from an unusual angle can seem almost mythical.

And when the encounter lasts only seconds, there may be no opportunity to reconsider the first impression.