Trinidad euphonia
... that the Trinidad euphonia lacks the muscular gizzard that most birds have as part of their digestive tract?
... that the <b id="mwA_U"><a href="./Trinidad_euphonia" id="mwA_Y" rel="mw:WikiLink" title="Trinidad euphonia">Trinidad euphonia</a></b> lacks the muscular <a href="./Gizzard" id="mwA_c" rel="mw:WikiLink" title="Gizzard">gizzard</a> that most birds have as part of their digestive tract?