Uroleucon is a genus of aphids known for their small size and plant-sucking behavior. They predominantly inhabit temperate regions and have a symbiotic relationship with ants, which protect them in exchange for honeydew. Uroleucon species can be identified by their long siphunculi and various body colorations, often in shades of red or black.

Uroleucon is a genus within the aphid family, and species within this genus are primarily found in the Northern Hemisphere. They are predominantly distributed across North America and Europe, with certain species also found in Asia. These regions provide various climates and environments that support the diverse species within the genus.

Uroleucon species typically inhabit temperate regions where they can find their host plants. They are commonly found in areas with moderate climates, including meadows, agricultural fields, gardens, and roadsides. The presence of specific host plants, usually belonging to the family Asteraceae, is a crucial factor for their habitat suitability.

Uroleucon aphids occupy a niche as phloem feeders on herbaceous plants, particularly favoring species in the Asteraceae family. They play a role in the ecosystem by acting as prey for various predators, such as ladybugs and lacewings, and are also involved in the complex interactions between plants and insects. Their niche is defined by their adaptation to feeding on specific host plants and their ability to reproduce quickly, allowing them to thrive in environments where these plants are abundant.