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.

Five-Years Ago (05-April-2016) — Atlantic Ocean

Viewed from the deck of the MV World Odyssey: Northern Gannet, Royal Tern, and Eurasian Collared-Dove. The Dove was a stowaway that we probably picked up while docked in Ghana. My eBird Checklist. My eBird Checklist. My eBird Checklist.


Viewed from the deck of the MV World Odyssey. Images taken with a Nikon N1V3 camera and 70-300 mm VR lens. Individual images in the slideshow are available in my PhotoShelter Gallery.

Thirteen-Years Ago (05-April-2008) — Louisiana

Gone to See America 2008 Driving Tour. Springtime in New Orleans

Afternoon walkabout along the Mississippi River: Laughing Gull. My eBird Checklist.


Afternoon walkabout along the Mississippi River in New Orleans. Image taken with a Nikon D300 camera and 18-200 mm lens. Individual images in the slideshow are available in my PhotoShelter Gallery.

Sunday (04-April-2021) — New Jersey

Springtime Backyard Nature in New Jersey.

Morning visitors to the backyard and patio birdfeeder: Turkey Vulture, Black-capped Chickadee, American Robin, Brown-headed Cowbird, Northern Cardinal.


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

Daily Electric Energy Used (53.3 kWh) from Sense. Daily Solar Electric Energy Produced (69.1 kWh) from Sense and SolSystems. Sunny. Geothermal HVAC system still on part of the day. A surplus of 15.8 kWh.

Weekly Electric Energy Used (347 kWh) from Sense. Weekly Solar Electric Energy Produced (400 kWh) from Sense and SolSystems. A surplus of 53 kWh.

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.