शुकः सारिका भृङ्गराजो वा सर्पविषशङ्कायां क्रोशति ॥ कZ_०१.२०.०७ ॥
śukaḥ sārikā bhṛṅgarājo vā sarpaviṣaśaṅkāyāṃ krośati
A parrot, a myna, or a bhṛṅgarāja bird cries out when there is suspicion of snake or poison.
Redundant sensing: rely on observable, low-tech indicators (animal behavior) to augment human vigilance in high-risk spaces.