The pink-spotted hawk moth (Agrius cingulata) visiting a blossom of Datura at the Arizona-Sonora Desert Museum. Hawk Moths or Sphinx Moths are currently the U.S. Forest Service's "Pollinator of the Month." Photograph by Dr. Robert Raguso.

Additional information about pollinators:
U.S. Forest Service – Celebrating Wildflowers! Pollinator pages
Arizona – Sonora Desert Museum: Migratory Pollinators
North American Pollinator Protection Campaign
Pollinator.org
The Xerces Society – Pollinator Conservation Program

Planting guides for pollinators:
Oregon Natural Resource Conservation Service (NRCS) – Plants for Pollinators in Oregon

Information on making nests for bees:
U.S. Department of Agriculture, Agricultural Research Service – Build a Nesting Block
U.S. Forest Service – Celebrating Wildflowers!  Create homes for Wild bees
The Xerces Society – Pollinator Conservation Program – Nests For Solitary Bees

Bee biology:
The Xerces Society – Pollinator Conservation Program – Biology and Life Cycles of Our Native Bees

National Wildlife Refuges (NWR) butterfly information:
   –  Butterfly Lists

Maryland –
    Eastern Neck NWR –
       butterfly list
       Bayview butterfly trail description and map (pdf)

Texas –
    Anahuac NWR butterfly list
    Santa Ana NWR – butterfly list
    Aransas NWR Complex – butterfly list

   –  Butterfly Gardens

Florida –
    Arthur R. Marshall Loxahatchee NWR
    Lower Suwannee NWR
Maryland –
    Blackwater NWR

   –  Endangered Butterflies

California –
    Antioch Dunes NWR
    Salinas River NWR

Wisconsin –
    Necedah NWR
   
Maryland –
    Blackwater NWR

Other Links:
Memorandum of Understanding with Coevolution Institute/North American Pollinator Protection Campaign (400 KB pdf file)