Robber fly declines due to forestry and agricultural practices have occurred in Finland, and grassland destruction and logging have probably reduced populations of robber flies in the Canadian Montane Cordillera Ecozone (Vaisanen, 1982; Cannings, 1999).
Kibbe Life Science Station in west-central Illinois contains a mosaic of forest and grassland habitats that offer excellent opportunities for studies of robber fly habitat associations.
Robber fly species richness was determined for each habitat.
Multi-response permutation procedures (MRPP) (Mielke and Berry, 2007) were used to assess variation in robber fly community composition among habitats.
Indicator species analysis, or ISA (Dufrene and Legendre, 1997), was used to describe and quantify habitat associations of robber fly species.
Microclimatic conditions appear to have a strong effect on activity patterns of some robber fly species as well (O'Neill et al.
The objectives of this study were to: 1) assess the diversity of forest robber flies at Post Wildlife Sanctuary, 2) compare abundance and diversity of robber flies between the lower and upper forest understory, and 3) examine seasonal patterns of robber fly abundance and diversity.
Simpson's diversity index (Simpson, 1949) was used to measure robber fly diversity at each understory level.
The multi-response permutation procedure (MRPP) was used to compare robber fly species composition/relative abundance between the two understory levels and to examine heterogeneity of robber fly species composition/relative abundance within each level.
June was the most active month for robber fly captures with 52, and the peak collection occurred on 23 June (Fig.
The autoecology of the hornet robber fly Asilus crabroniformis L.
Oviposition and eggs of an Australian robber fly, Neoaratus abludo Daniels (Diptera: Asilidae).
Most of the North American robber fly species from the family Asilidae (experts estimate more than 1,000 different species) have a long wasplike abdomen.
Robber fly adults lay eggs in the summer in soil or rotten wood.
Not exactly appealing to look at, the hornet robber fly
survives by consuming dung beetles.