Status:    rare, sporadic resident/migrant?

Flights:  1 (overwintering) Feb-Apr, next brood migrates east May-Jun


Distribution/known sites in Monterey County:  not known; no recent records


Habitats:  moist woodland openings, low elev watercourses along coast?

Host plants:  nettles

Adult foodnectars at thistles, goldenrods; probably sap and rotting fruit


Conservation: not needed


Remarks: 

  1.   local, altitudinal movements not well known

  2.   occasionally migrates south to soCal

  3.   found away from breeding habitats

  4.   hibernates low elev sites, more likely inland valleys than coast

  5.   summer brood returns Sep-Oct from e. Sierra

  6.   sexes similar

 
 

Milbert’s tortoiseshell Nymphalis milberti

Life history facts


egg: laid in large batches of up to 900 on underside of host plant leaves

larva: feeds together when young in a web; when older, feed alone and make shelters of folded leaves tied with silk

pupa:

adult:  hibernates, sometimes in small groups

awaiting photo