Observations on Predation of Overwintering Monarch Butterflies (Danaus plexippus) (Nymphalidae) in California by the Western Yellowjacket (Vespula pensylvanica) (Vespidae)

First Author: 

  • Diana Magor

Type: 

  • Article

Year: 

2025

Source: 

  • Journal of the Lepidopterists’ Society

Category: 

  • Overwinter dynamics, Natural enemies

Full Reference: 

Magor, Diana & David G. James. Observations on Predation of Overwintering Monarch Butterflies (Danaus plexippus) (Nymphalidae) in California by the Western Yellowjacket (Vespula pensylvanica) (Vespidae). J. Lep Soc. 79(4):293-296

Study Setting: 

  • Field

Geographic Focus: 

  • Western Overwintering

Field Definitions

First author: Last name of the first author
Type: Article or book chapter
Year: Publication year
Source: Journal or book
Category*: Broad scope of the publication.
Research topic (monarch & supporting research only)*: Specific topic.
Geographic focus*: Geographic setting for field studies.
Monitoring data used: Data from monitoring or public data efforts.
* Full list