Staffan Widstrand / Chukar partridge (Alectoris chukar) Haleakala National Park, Maui, Hawaii.

Staffan Widstrand / Chukar partridge (Alectoris chukar) standing on one foot, Haleakala National Park, Maui, Hawaii.

David Fleetham / View across crater of dormant Haleakala / East Maui Volcano. Haleakala National Park, Maui, Hawaii. March 2016.

David Fleetham / Hawai'i silversword (Argyroxiphium sandwicense macrocephalum) covered by an unusual snowfall near crater summit of dormant Haleakala / East Maui Volcano. Haleakala National Park, Maui, Hawaii. Feb...

David Fleetham / Waterfall, Haleakala National Park, Maui, Hawaii. June.

David Fleetham / Makahiku Falls, along the Pipiwai Trail in Ohe'o Gulch, Haleakala National Park, Kipahulu, Maui, Hawaii.

David Fleetham / Pu'u o Pele and Pu'u o Maui cinder cones in Haleakala National Park, Maui's dormant volcano, Hawaii. March 2016.

David Fleetham / An aerial view across Sliding Sands Trail and Haleakala Crater to 'Science City' high altitude observatory at the summit in Haleakala National Park, Maui's dormant volcano, Hawaii, June 2011.

David Fleetham / An aerial view of 'Science City' high altitiude observatory above the clouds in Haleakala National Park, Maui's dormant volcano, Hawaii, June 2011.

David Fleetham / An aerial view across Haleakala Crater showing Ka Lu'u o ka O'o Cone and the last few miles of the road leading to the summit and 'Science City'. Haleakala National Park, Maui's dormant volcano, Hawai...

David Fleetham / Panoramic view from Kalahaku Overlook across Haleakala Crater, Haleakala National Park, Maui's dormant volcano, Hawaii. (Eight vertical images were stitched together in Photoshop to make this large fi...

David Fleetham / View from Kalahaku Overlook, from Haleakala Crater and Ka Lu'u o ka O'o Cone, Haleakala National Park, Maui's dormant volcano, Hawaii. Sliding sands trail can be seen behind the cone.