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.

Eight-Years Ago (04-April-2013) — New Jersey

Backyard Springtime Nature in New Jersey

Afternoon walkabout: Carolina Wren, American Robin. My eBird Checklist.


Afternoon walkabout. Image taken with a Nikon 1 V2 camera, FT1 adapter, and 80-400 mm VRII lens; or Nikon D4 camera and 600 mm f/4 VR lens; or a Nikon D800 camera and 80-400 mm VR lens.. Individual images in the slideshow are available in my PhotoShelter Gallery.

Saturday (03-April-2021) — New Jersey

Springtime Backyard Nature in New Jersey.

Morning visitors to the backyard and patio birdfeeder: Tufted Titmouse, Carolina Wren, Brown-headed Cowbird, Northern Cardinal.


Daily backyard visitors. Individual images in the slideshow are available in my PhotoShelter Gallery.

Daily Electric Energy Used (83.8 kWh) from Sense. Daily Solar Electric Energy Produced (74.9 kWh) from Sense and SolSystems. Sunny. Geothermal HVAC system was on again (including resistance heating) as the house got too cold inside. A deficit of 8.9 kWh.

Eight-Years Ago (03-April-2013) — New Jersey

Backyard Springtime Nature in New Jersey

Afternoon walkabout: Northern Cardinal. My eBird Checklist.


Afternoon walkabout. Image taken with a Nikon 1 V2 camera, FT1 adapter, and 80-400 mm VRII lens. Individual images in the slideshow are available in my PhotoShelter Gallery.

Fourteen-Years Ago (03-April-2007) — New Jersey

Backyard Springtime Nature in New Jersey

Afternoon walkabout: Great Blue Heron, American Crow, Red-tailed Hawk, American Robin, Northern Cardinal. My eBird Checklist.


Afternoon walkabout. Image taken with a Nikon D2xs camera and 80-400 mm VR lens. Individual images in the slideshow are available in my PhotoShelter Gallery.