noun, masculine/xilˈɡeɾo/plural: jilgueros
jilguero is masculine in Spanish.
European goldfinch, Eurasian goldfinch (Carduelis carduelis)
Related: jilguero austral, jilguero golinegro
From silguero, from Latin sily̆bum, from Ancient Greek σίλυβον (sílubon, “thistle”).