@hal@slime.global https://www.amazon.com/gp/product/0988596504/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 its called the field guide to mesozoic birds and has detailed drawings of pre cenozoic (the time period we live in post the non avian dino exctinvtions) birds, with descriptions of possible behaviors.
also details on how quintessential birdy things may have evolved, like feathers, mobile tail fans, folding arms, etc