Modifiers matching grassland:

• natural,
• temperate,
• arid,
• wet,
• open,
• upland,
• agricultural,
• rough,

Simple categories matching upland:

• raptor,
• mammal,
• bird,
• game,
• community,
• crop,
• grassland,
• area,
• shrub,
• passerine,
• location,
• species,
• wader,
• vegetation,
• site,
• space,
• cover,
• development,
• feature,