Minecraft wiki entry for Before_1.18, associated text: The rare modified jungle variant featured much more mountainous terrain, being taller and steeper than jungle hills. The heights, combined with the thick foliage, rendered the ground below almost entirely out of sight. Ocelots, parrots, and pandas spawned in this biome, but jungle pyramids didn't generate here. In Java Edition, modified jungles used the same mob spawning chances as jungle hills for hostile and ambient categories, and had different chances for passive categories: