What do female Deer Flies primarily do?

Female Deer Flies primarily target livestock for blood, which is a critical aspect of their reproductive cycle. Unlike their male counterparts who feed on nectar and plant juices, female Deer Flies require blood meals to obtain the necessary proteins for egg development. This behavior is why they are often found around animals, particularly in rural or agricultural areas where livestock are present. The female Deer Fly uses its biting mouthparts to draw blood, which can also lead to discomfort and stress for the host animals.

The other options do not accurately reflect the behavior of female Deer Flies. While they do inhabit various environments, they are not primarily urban dwellers, and they do not feed on plant juices. Additionally, female Deer Flies do not lay their eggs in dry soil; instead, they typically prefer moist environments near water sources where conditions are suitable for their larvae to thrive. This highlights the importance of understanding the role and behavior of these pests in their ecosystems.