1) Abounding in avifauna 2) Abounding in quail, etc 3) Character created by Jim Lee 4) Debut novel 5) English girl name 6) Folding bicycle 7) Like a wren or robin 8) Little chick 9) Novel by William Wharton 10) Ornithoid 11) William wharton novel Found on https://www.crosswordclues.com/clue/birdy
High performance aluminium folder. Devotees salivate over its German engineering and the simple fact that it isn't a Brompton. Coincidentally the name of an allegorical novel by William Wharton, about a boy who thinks he's a birdy (not the bike). Found on http://www.bikereader.com/contributors/SAM/glossary.html