Arthashastra
स एव पक्ष कक्षाभ्यां प्रतिक्रान्तो दृढकः ॥
The same is called dridhaka (firm) when its wings and flanks are stretched back.
english translation
sa eva pakSa kakSAbhyAM pratikrAnto dRDhakaH ॥
hk transliteration by SanscriptArthashastra
स एव पक्ष कक्षाभ्यां प्रतिक्रान्तो दृढकः ॥
The same is called dridhaka (firm) when its wings and flanks are stretched back.
english translation
sa eva pakSa kakSAbhyAM pratikrAnto dRDhakaH ॥
hk transliteration by Sanscript