Hills

Hills is a Better Spawner Category that contains by default the following biomes:

Vanilla Biomes

Biome	Biome ID
Birch Forest Hills	minecraft:birch_forest_hills
Dark Forest Hills	minecraft:dark_forest_hills
Giant Spruce Taiga Hills	minecraft:giant_spruce_taiga_hills
Giant Tree Taiga Hills	minecraft:giant_tree_taiga_hills
Taiga Hills	minecraft:taiga_hills
Tall Birch Hills	minecraft:tall_birch_hills
Wooded Hills	minecraft:wooded_hills

Biomes O' Plenty Biomes

Biome	Biome ID
Highland	biomesoplenty:highland
Highland Moor	biomesoplenty:highland_moor
Rainbow Hills	biomesoplenty:rainbow_hills
Redwood Hills	biomesoplenty:redwood_hills
Shrubland Hills	biomesoplenty:shrubland_hills

Biomes You'll Go Biomes

Biome	Biome ID
Aspen Forest Hills	byg:aspen_forest_hills
Black Forest Hills	byg:black_forest_hills
Blue Taiga Hills	byg:blue_taiga_hills
Boreal Forest Hills	byg:boreal_forest_hills
Cika Mountains	byg:cika_mountains
Deciduous Forest Hills	byg:deciduous_forest_hills
Evergreen Hills	byg:evergreen_hills
Jacaranda Forest Hills	byg:jacaranda_forest_hills
Maple Hills	byg:maple_hills
Red Oak Forest Hills	byg:red_oak_forest_hills
Seasonal Birch Forest Hills	byg:seasonal_birch_forest_hills
Seasonal Forest Hills	byg:seasonal_forest_hills
Seasonal Taiga Hills	byg:seasonal_taiga_hills
Zelkova Forest Hills	byg:zelkova_forest_hills