Gil was a comic strip created by Norm Feuti, who also drew the strip Retail from 2006 to 2020. This started as a side project, and when it didn't take off in syndication he continued to produce Sunday editions for his local newspaper, the Providence Journal, until new management cancelled it at the end of last year. This is the only time I remember him featuring birds in any way. (And you can't really blame Gil for his attitude after this.)
Show Me The Funny: Another selection from Bob Mankoff's collection of toons from his days as an editor at The New Yorker, among other notable magazines. The artist is Jacob Samuel Fox, the year and original publication unknown.