In all actuality, the Colorado Birding Trail is more a conglomeration of key birding sites throughout the state than a physical trail. But the concept — sponsored by the Colorado Department of Wildlife, Colorado State Parks and a flock of birding organizations — has an interactive home on the Internet, where nature lovers can piece together an itinerary that will take them to the best places on the eastern plains to view plovers and prairie chickens or figure out where in the Rockies they might be able to find MacGillivray's Warblers or Flammulated Owls. An ongoing project-in-progress, the website will eventually grow to include avian hot spots all over the state, from the Comanche Trail in southeastern Colorado to Grand Junction. Train your binoculars on the trail.