Spontaneous solving of an insight-based means-end reasoning task (the string-pulling problem) is observed in an adult male captive bred Greater Vasa parrot (Coracopsis vasa Shaw, 1812), with an efficiency of 66%, replicating previous work in a singleton context. This case report adds to the existing literature on this species by also demonstrating longitudinal retention, specifically the same bird was found to be able to re-solve the simple form of the problem after a period of seven years (the bird was first tested in 2013, and re-tested in 2020), with an efficiency of 43% (the difference between efficiencies was not significant, χ² = 0.991, p = .319). In a second analysis, species-level data across five patterned string-pulling tasks involving 14 parrot species were reanalysed, revealing that the Greater Vasa parrot exhibited the greatest general competence among those evaluated. A ‘general insight factor’ (GIF) was also found across taxa, the loadings onto which exhibit positive and large-magnitude associations with the correlation between fission-fusion flocking intensity and indicator level performance (r = 0.831), and also positive small and modest-magnitude associations with the correlation between relative brain size and indicator-level performance, and the magnitude of average pair-wise species differences in performance across indicators (r = 0.219 and 0.365 respectively). Finally, the theoretical implications of these findings are discussed.

在成年雄性圈养大瓦萨鹦鹉（Coracopsis vasa Shaw，1812）中观察到以见解为基础的均值终点推理任务（拉弦问题）的自发解决，效率为66％，可重复使用以前的工作。单例上下文。该案例报告还通过证明纵向保留来增加了有关该物种的现有文献，特别是发现同一只鸟经过七年的时间能够解决该问题的简单形式（该鸟于2013年首次接受测试）在2020年，并重新测试），以43％的效率（效率之间的差异不显著，χ ²  = 0.991，p = .319）。在第二次分析中，重新分析了涉及14种鹦鹉物种的五个带图案的拉线任务的物种水平数据，这表明大瓦萨鹦鹉表现出最大的综合能力。在整个生物分类群中也发现了一个“一般洞察因子”（GIF），其负荷表现出裂变融合植绒强度与指标水平性能之间的正相关和大幅度相关（r  = 0.831），以及较小和较小的正相关。适度的幅度关联与相对大脑大小和指标水平绩效之间的相关性，以及跨指标的平均成对物种差异的幅度（r 分别为0.219和0.365）。最后，讨论了这些发现的理论含义。