Netfugl.dk
Includes sightings, Denmark bird list, photo gallery, and listers' rankings. In Danish with some English content.

Birdwatch.dk
Danish bird observations, photo gallery, bird sites, species list, forum, links, and translation of birdnames. In Danish and English.

Birds of Denmark
High quality photo gallery.

Birding Sites Around Copenhagen
Descriptions and maps for a small number of sites by Thomas Nielsen.