Matsya Purana — Description of Atri’s Hermitage: Sacred Grove Planning
ददृशे च तथा तत्र नानारूपान् पतत्रिणः मयूरान् शतपत्त्रांश्च कलविङ्कांश्च कोकिलान् //
dadṛśe ca tathā tatra nānārūpān patatriṇaḥ mayūrān śatapattrāṃśca kalaviṅkāṃśca kokilān //
And there, he likewise beheld birds of many kinds and forms—peacocks (mayūra), śatapattras, kalaviṅkas, and cuckoos (kokilā).
This verse does not describe Pralaya; it is a descriptive passage highlighting an auspicious, life-filled landscape marked by beautiful and melodious birds.
Indirectly, such descriptions function as markers of a wholesome, auspicious environment—useful for a king choosing pleasant regions for settlement or for householders seeking sacred, sattvic places associated with calmness and good omens.
No direct architectural rule is stated, but the presence of auspicious birds is traditionally treated as a favorable omen when selecting sites for habitation, āśramas, or temple precincts—an idea often aligned with Vastu-oriented site assessment.