Explaining Nature on Instagram: "Animals recognize us in far more ways than we usually realize. Many species can identify individual humans by scent, which is often their strongest sense, allowing them to tell people apart even after long periods of time. Some animals also use visual cues like body shape, posture, and the way we move. Research has shown that animals such as dogs, horses, cows, and even birds can distinguish between different human faces or silhouettes, not just familiar clothing