Author: David Mathre

I am a scientist by training (Eckerd College, BSc; Caltech, Ph.D.). I worked for 27 years as a Chemist in the Pharmaceutical Industry developing processes to manufacture medicines for human and animal health. I now spend my time as a photographer and world traveler. My interests include the natural world, wildlife, landscapes, sky, and seascapes, travel, and astrophotography. I look for unique ways of viewing the world and presenting my images. I have traveled to over 55 countries in six continents, often on Semester at Sea voyages. While at home in New Jersey, I spend time on home renovation and expansion of a wildflower garden/meadow.

Eleven-Years Ago (24-February-2010) — California

Wintertime in Yosemite National Park.

Yosemite Valley. Individual images in the slideshow are available in my PhotoShelter Gallery.

Thirteen-Years Ago (24-February-2008) — Colorado

Wintertime in Mesa Verde National Park.

Winter panorama in Colorado from Mesa Verde National Park. Image taken with a Nikon D3 camera and 14-24 mm f/2.8 lens (ISO 200, 14 mm, f/11, 1/1250 sec). (David J Mathre)

Spruce Tree House cliff dwelling in the winter. Mesa Verde National Park. Image taken with a Nikon D300 camera and 18-300 mm VR lens (ISO 360, 50 mm, f/8. 1/250 sec). (David J Mathre)

Spruce Tree House cliff dwelling in the winter. Mesa Verde National Park. Image taken with a Nikon D300 camera and 18-300 mm VR lens (ISO 560, 31 mm, f/8. 1/250 sec). (David J Mathre)

Window in a window at Spruce Tree House cliff dwelling. Mesa Verde National Park. Image taken with a Nikon D3 camera and 80 mm VR lens (ISO 720, 42 mm, f/8. 1/250 sec). (David J Mathre)

Stone Grain Grinding Tool. (David J Mathre) — Stone Grain Grinding Tool. Mesa Verde National Park. Image taken with a Nikon D300 and 18-200 VR lens (ISO 200, 135 mm, f/11, 1/250 sec). (David J Mathre)

Mesa Verde National Park winter panorama. Composite of 10 images taken with a Nikon D3 camera and 80-400 mm VR lens (ISO 200, 80 mm, f/4.5, 1/200 sec). Raw images processed with Capture One Pro and the composite generated using AutoPano Giga Pro. (David J Mathre)

The individual images used to create the above Mesa Verde National Park winter panorama. They are available in my PhotoShelter Gallery.

Square Tower House cliff dwelling. Mesa Verde National Park. Image taken with a Nikon D3 camera and 80-400 mm VR lens (ISO 200, 80 mm, f/4.5. 1/200 sec). (David J Mathre)

Cliff Palace in the winter. Mesa Verde National Park. Image taken with a Nikon D3 camera and 80-400 mm VR lens (ISO 200, 270 mm, f/5.3, 1/80 sec). (David J Mathre)

Icicles. (David J Mathre) — Icicles. Mesa Verde National Park. Image taken with a Nikon D300 and 70-200 mm f/2.8 VR lens (ISO 200, 135 mm, f/5, 1/160 sec). (David J Mathre)

Fourteen-Years Ago (24-February-2007) — New Jersey

Wintertime Backyard Nature in New Jersey.

Backyard Walkabout: Turkey Vulture, Blue Jay, Northern Cardinal. eBird Checklist

Backyard Walkabout. Individual images in the slideshow are available in my PhotoShelter Gallery.

Tuesday (23-February-2021) — New Jersey

Wintertime Backyard Nature in New Jersey.

Visitors to the birdfeeder: American Crow, Black-capped Chickadee, Tufted Titmouse, House Finch, Dark-eyed Junco, White-throated Sparrow, Song Sparrow, Northern Cardinal.

Backyard Birdfeeder. Individual images in the slideshow are available in my PhotoShelter Gallery.

Daily Electric Energy Used (77.8 kWh) from Sense. Daily Solar Electric Energy Produced (7.8 kWh) from Sense and SolSystems. The solar panels partially covered with snow. Geothermal HVAC system on. A deficit of 70.0 kWh.

Tuesday (23-February-2021) — New Jersey

Winter Nighttime Backyard Nature in New Jersey.

A doe got up onto the patio and ate my hibernating strawberry plants during the night.