Of, pertaining to, or characteristic of birds; avian.
1850, Thomas Lynch, Memorials of Theophilus Trinol, student:Truth for the bird his eye discerns; By birdly hope his wing is strong; And full delight in birdly good; Makes utterance for itself in song.
1916, John Rose, Poems: dedicated in loving memory to my boy Chester:"Nay, nay," quoth Luxury, "I laugh at thee, — Thou art the king of beasts and I of birds ; Men are of beastly and of birdly kind, But more are birdly and obedience show Only to me, for in their bosom nursed Caprice and Vanity which are my slaves ...
2002, John Hanson Mitchell, Following the sun: a bicycle pilgrimage from Andalisia to the Hebrides:And in the birdly mind (actually in the birdly gonads), spring begins on their winter grounds with the increasing sunlight, as early as February.