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 (27-March-2021) — New Jersey

Springtime Nature in New Jersey

Afternoon Walkabout at the Sourland Mountain Preserve: Canada Goose, Turkey Vulture, American Robin. My eBird Checklist.


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

Friday (26-March-2021) — New Jersey

Springtime Backyard Nature in New Jersey.

Evening visitor to the patio birdfeeder: Tufted Titmouse.

Female House Finch. (David J Mathre)
Tufted Titmouse (Baeolophus bicolor). Image taken with a Nikon D850 camera and 500 mm f/4 VR lens. (David J Mathre)

Spring Wildflowers: Daffodils and Purple Crocuses


Spring Wildflowers (landscape mode). Image taken with a Fuji X-H1 camera and 200 mm f/2 OIS lens and 1.4 x teleconverter. Individual images in the slideshow are available in my PhotoShelter Gallery.


Spring Wildflowers (portrait mode). Image taken with a Fuji X-H1 camera and 200 mm f/2 OIS lens and 1.4 x teleconverter. Individual images in the slideshow are available in my PhotoShelter Gallery.

Daily Electric Energy Used (44.4 kWh) from Sense. Daily Solar Electric Energy Produced (50.2 kWh) from Sense and SolSystems. Sunny. Geothermal HVAC system was off. A surplus of 5.8 kWh. Sense was down part of the day due to power glitch and WiFi/networking issues.

One-Year Ago (26-March-2021) — New Jersey

Backyard Springtime Nature in New Jersey

Afternoon Walkabout: Dark-eyed Junco. My eBird Checklist.


Afternoon walkabout. Image taken with a Nikon D5 camera and 600 mm f/4 VR lens. Individual images in the slideshow are available in my PhotoShelter Gallery.

Eight-Years Ago (26-March-2013) — New Jersey

Backyard Springtime Nature in New Jersey

Afternoon Walkabout: Turkey Vulture, American Crow, House Finch. My eBird Checklist.


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