Experts have noted that with the increase of malaria, sparrows are now flying farther afield to search for leaves of a tree known for its high concentrations of naturally occurring quinine, which is an antimalarial medicine.
Para ahli memperhatikan bahwa seraya malaria meningkat, burung pipit kini terbang lebih jauh mencari dedaunan dari pohon yang secara alami menghasilkan kandungan tinggi kina, obat antimalaria.