三亚爪哇金丝燕种群数量大幅提升

Core Viewpoint - The population of Java sparrows in Sanya has significantly increased due to collaborative conservation efforts, showcasing a successful example of human-nature coexistence [1][3]. Group 1: Population Recovery - The Java sparrow, a nationally protected species, had disappeared from Sanya for years but has now returned, with numbers growing from zero to over 400 individuals in a simulated habitat [2][3]. - In 2014, a research base was established to aid in the recovery of the Java sparrow population, leading to the first sightings of wild sparrows nesting in 2015 [2][3]. - By 2025, the estimated population of Java sparrows in Sanya has reached over 10,000, indicating a successful recovery [3]. Group 2: Habitat and Environmental Factors - The Java sparrow prefers dark, humid environments for nesting, which has led to the creation of artificial habitats that mimic natural caves [2][3]. - The increase in Java sparrow sightings in residential areas is attributed to favorable climatic conditions and abundant food sources from surrounding farmland [5][6]. - The improvement of the ecological environment in Hainan and the rising awareness of environmental protection among residents have created a welcoming atmosphere for the return of the Java sparrow [5][6]. Group 3: Ecological and Economic Value - Java sparrows are considered "farm guardians" as they consume a significant amount of agricultural pests, with estimates suggesting that 2,400 sparrows can eliminate around 6,000 kilograms of pests annually [6][7]. - The potential for sustainable harvesting of abandoned nests could lead to the development of an ecological industry, balancing ecological and economic benefits [7][8]. - Ongoing research aims to assess the impact of the Java sparrow population on the local ecosystem and its role in pest control, ensuring a sustainable coexistence with humans [8].