Brihat Jataka
खगे दृकाणे बलसय्युँतेन वा ग्रहेण युक्ते चरभांशकोदये ॥ बुधांशके वा विहगा: स्थलाम्बुजा: शनैश्चरेन्द्वीक्षणयोगसंभवा: ॥ ३-५ ॥
If in the birth chart there is in the ascendant the navamsha of a movable sign and a strong planet in lagna occupies a "bird decante" the birth of a bird takes place. Similarly if the navamshain the lagna belongs to Mercury and the lagna is associated with or aspected by Saturn or Moon, then also the birth of a bird takes place. ln case of the influence on the lagna or Saturn the bird will be living on earth. If it is of Moon it would be a watery bird (the whole thing is of course subject to the basic conditions specified in the first two shlokas of this chaptal' regarding the strength of malefics and the debility of benefics etc.).
english translation
khage dRkANe balasayyu~tena vA graheNa yukte carabhAMzakodaye ॥ budhAMzake vA vihagA: sthalAmbujA: zanaizcarendvIkSaNayogasaMbhavA: ॥ 3-5 ॥
hk transliteration by Sanscript