Researchers analyzed 37 urban bird species and discovered that male humans can approach birds more closely than female humans can. The birds tolerate men at shorter distances, suggesting they perceive and respond differently to sex differences in humans.
The finding reveals that urban birds possess the ability to distinguish between men and women. How they accomplish this remains unknown. Scientists lack clear explanations for the pattern.
The research raises questions about bird behavior and human-wildlife interaction in cities. Birds may respond to physical differences like size or voice pitch. They might associate men or women with different threat levels based on past experiences. Alternatively, behavioral differences between how men and women move around birds could explain the gap.
Further investigation is needed to determine what specific cues birds use to identify human sex. Researchers plan to test whether birds show consistent preferences across different urban environments. They will also examine whether individual bird species show stronger sex-based responses than others.
Understanding how urban wildlife perceives humans has practical implications. It could improve wildlife management strategies in cities and inform how people should interact with urban bird populations.