Fawn (isabel)
A variant of Java sparrow (Padda oryzivora)

Representative Java sparrowphoto — a dedicated image of this exact morph isn't available yet.
A dilution mutation turning the grey to a soft warm fawn/cinnamon brown while keeping the cheek and head pattern. Often a sex-linked dilution.
Keeper tips for this variant
Fawn is sex-linked, so plan pairings to know which chicks will show it versus carry it split; keep them out of harsh sun to prevent the soft fawn fading.