All are 5x5 embarks. World was generated with settings down the middle on Play Now!, except I did shortest history:

embark 1: Tropical Freshwater Swamp (Hot, Heavily Forested, Thick, Wilderness): 9 total colonies (1 honey bee)
embark 2: Temperate Freshwater Swamp (Warm, Heavily Forested, Thick, Wilderness): 8 total colonies (3 honey bees)
embark 3: Temperate Saltwater Marsh (Temperate, Woodland, Moderate, Calm): 0 colonies
embark 4: Temperate Conifer Forest (Temperate, Heavily Forested, Thick, Calm): 0 colonies
embark 5: 2 Biomes: Temperate Shrubland (Temperate, Woodland, Moderate, Calm) and Temperate Conifer Forest (Temperate, Heavily Forested, Thick, Calm): 0 colonies
embark 6: 2 Biomes: Temperate Shrubland (Temperate, Woodland, Moderate, Calm) and Temperate Freshwater Swamp (Warm, Heavily Forested, Thick, Wilderness): 0 colonies.  In this one the first biome (the Temperate one) took up 23 tiles and the second, warm biome took up the bottom right 2 tiles.
embark 7: 2 Biomes: 11 tiles of Temperate Freshwater Swamp (Warm, Heavily Forested, Thick, Wilderness) and 14 tiles of Temperate Shrubland (Temperate, Woodland, Moderate, Calm): 0 colonies.
embark 8: 2 Biomes: 6 tiles of Temperate Saltwater Marsh (Temperate, Woodland, Moderate, Calm) and 19 tiles of Temperate Freshwater Marsh (Warm, Woodland, Moderate, Calm): 0 colonies.
embark 9: Taiga (Cold, Heavily Forested, Thick, Wilderness): 0 colonies
embark 10: Temperate Shrubland (Cold, Woodland, Moderate, Wilderness): 0 colonies
embark 11: Tropical Moist Broadleaf Forest (Hot, Heavily Forested, Thick, Untamed Wilds): 9 colonies (1 honey bee)
embark 12: Tropical Shrubland (Scorching, Woodland, Moderate, Untamed Wilds): 0 colonies