Philanthus crabroniformis

F. Smith, 1856

beewolf

Philanthus crabroniformis is a of bee-hunting wasp, commonly known as a 'beewolf,' native to North America. The species belongs to the Crabronidae and primarily preys upon bees in the family Halictidae. Females construct nests in sandy soils and provision them with paralyzed prey for their larval offspring. The species has been documented in sympatry with P. gibbosus, with which it shares similar prey preferences but exhibits distinctive nest approach that may represent an evolutionary response to parasitic pressure from miltogrammine flies.

Philanthus crabroniformis by MeadowLore. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Philanthus crabroniformis: /fɪˈlænθəs kræˈbroʊnɪˌfɔrmɪs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Images

Habitat

Sandy soils, including bare, coarse sand, sandy-clay, or sandy loam substrates suitable for nest excavation.

Distribution

North America; recorded from Canada (including Alberta) and the United States.

Diet

Bees, primarily members of the Halictidae (sweat bees).

Behavior

Females exhibit distinctive nest approach patterns when returning with prey, differing from sympatric Philanthus . Males are territorial and perch on low vegetation to intercept females or chase off competing males. Females actively stalk bees at flowers, sting them between the front legs to paralyze them, and transport prey beneath the body using the middle legs. Multiple prey items are required to provision a single larval . The species engages in burrow sharing, with sibling females sometimes occupying birth nests temporarily before dispersing. Males may spend nights and periods of inclement weather in female burrows, often returning to the same burrow repeatedly.

Ecological Role

of bees; control of Halictidae. visit flowers for nectar and may contribute to pollination. The serves as to various including satellite flies ( Sarcophagidae, Metopia, Senotainia, Hilarella), velvet ants (Dasymutilla nigripes), and cuckoo wasps (Hedychrydium dimidiatum).

Similar Taxa

Philanthus gibbosusSympatric with similar prey preferences and nesting ; distinguished by distinctive nest approach and potentially subtle morphological differences.
Nomada (cuckoo bees)Superficially similar appearance that can lead to misidentification; cuckoo bees lack the predatory and nest construction of beewolves.