Ramayana
कोकिलैर्भृङ्गराजैश्च नानावर्णैश्च पक्षिभिः । शोभितां शतशश्चित्रां चूतवृक्षावतंसकैः ॥ 7-42-8 ॥
It was beautified by cuckoos, by bhringaraja birds, and by birds of various hues, and rendered wondrous in hundreds of ways, with mango trees as its ornaments.
english translation