Summary
Highlights
The video opens with an observation of a white and black bird, often seen running in convenience store parking lots. These birds, known as white wagtails, have become increasingly common, leading to curiosity about their presence in urban areas and their unique behavior, often seen walking around cars without fear.
The white wagtail (haku-sekirei) is a bird categorized under the sparrow family, about 21cm long, distributed across Russia, the Korean Peninsula, and Northeast China. Contrary to popular belief, they are not an invasive species but have naturally expanded their habitat to urban areas of Japan, including convenience store parking lots, due to their ability to find suitable living spaces. They are omnivores, primarily feeding on insects and worms found in the soil.
White wagtails have deep historical roots in Japanese culture, appearing in ancient myths like the Kojiki and Nihon Shoki. They are believed to have taught the gods Izanagi and Izanami how to procreate, thus contributing to the creation of Japan. This historical significance has led them to be revered as a symbol of 'matchmaking' and are still associated with weddings and power spots.
Unlike most other small birds that hop, white wagtails walk by alternating their feet, similar to humans. This walking style is efficient for long distances and foraging. Originally winter birds in Japan, their lifestyle drastically changed from the 1970s to the 2000s, expanding their breeding grounds from northern Japan to increasingly southern and urbanized areas across the country, adapting to asphalt as their new riverbed.
Convenience store parking lots have become ideal habitats for white wagtails due to their adaptable diet and low caution around humans. They've learned to eat food scraps, which are high in calories, and see these flat, open spaces as perfect foraging grounds. The clear visibility helps them spot prey and avoid predators like crows and raptors, which generally avoid human-dense areas. The continuous lighting at night also attracts insects, providing a constant food supply, making these sites a "time-unlimited buffet" for them.
White wagtails exhibit high learning abilities, preferring larger parking spaces and busier convenience stores where they are less likely to be disturbed and can easily find food. They pass this knowledge to subsequent generations. However, it's crucial not to feed them intentionally, as it can lead to aggressive behavior and health issues from an unnatural diet.
While foraging in parking lots, white wagtails don't nest there. They ingeniously utilize gaps in artificial structures, such as behind building signs, in air conditioner vents, and even in postal boxes or train gaps. For winter roosting, they gather in large numbers in noisy urban areas like train station street trees, illuminated signs, and under large bridges. These spots are warmer than natural environments due to urban heat and residual heat from asphalt, providing a natural 'underfloor heating' system.
The video introduces other synanthropic animals (those coexisting with humans) that have adapted to urban life: the Blue Rock Thrush, which nests in tall buildings mimicking cliffs; pigeons, known for their high breeding rate thanks to 'pigeon milk' and nesting in high places; house bats, utilizing roof spaces and wall gaps for roosting and hunting insects around streetlights; and raccoons, which have increasingly moved into urban residential areas, foraging on garbage and garden fruits.
The video concludes by stressing the importance of understanding and coexisting with these urban wildlife, like the white wagtail. Instead of direct feeding, which can disrupt their natural behavior and cause problems, it's better to observe them from a distance. It also highlights the need for thoughtful management and environmental整備 (environmental improvement) to foster a harmonious relationship between humans and wild animals, avoiding outright exclusion.