Rubber Band Courtship: Bizarre Natural Behavior Saddens Birdwatching Experts

Birdwatching experts are expressing sorrow over the increasing impact of human-made pollution on wildlife, highlighted by a recent observation of a crested tern attempting to use a rubber band for courtship.

The unusual behavior was documented on Pengpeng Beach, a narrow sandbar in Penghu, Taiwan, formed after Typhoon Wayne in 1986. While a quarter of the area is designated for water recreation, three-quarters serve as a vital seabird conservation zone. Zheng Qiansun, head of the Penghu Wild Bird Society's investigation team, recorded the distressing sight.

Zheng shared his sadness on social media, noting that "man-made chemical substances are constantly harming our earth." He described witnessing a male crested tern present a rubber band to a female as part of its mating ritual. Fortunately, the female bird rejected the offering. However, the male persisted, and eventually, the male bird swallowed the rubber band out of apparent disinterest from the female. Zheng expressed concern about the bird's well-being.

Pengpeng Beach accumulates significant amounts of marine debris after the northeast monsoon, detracting from its appearance and disrupting seabird breeding. Cases of marine animals dying from ingesting plastic bags are frequently reported. Between April and September each year, various tern species, including the crested tern, migrate to Penghu to breed and feed. The crested tern, a large seabird with a distinctive black crest and a prominent yellow beak, is a common summer migratory bird in Taiwan, primarily inhabiting offshore islands and reefs, with the Matsu and Penghu archipelagos serving as key breeding grounds.