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.

Seven-Years Ago (06-April-2014) — New Jersey

Backyard Springtime Nature in New Jersey

Afternoon walkabout: Turkey Vulture, American Crow. My eBird Checklist.


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

Fourteen-Years Ago (06-April-2007) — New Jersey

Backyard Springtime Nature in New Jersey

Afternoon walkabout: Turkey Vulture, Tufted Titmouse, Northern Mockingbird, American Robin, White-throated Sparrow, Song Sparrow, Eastern Towhee, 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.

Monday (05-April-2021) — New Jersey

Springtime Backyard Nature in New Jersey.

Meditating Troll. (David J Mathre)
Meditating Troll waiting for the mail. Image taken with a Leica SL2 camera and 90-280 mm lens. (David J Mathre)

Morning visitors to the backyard and patio birdfeeder: Tufted Titmouse, House Finch, American Goldfinch, Dark-eyed Junco, Brown-headed Cowbird, Northern Cardinal.


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

Early Spring Flowers. A variety of Daffodils. Forsythia that the deer didn’t get. Still waiting on the Tulips (and hoping the deer stay away)


Early Spring Flowers (portrait mode). Images taken with a Leica SL2 camera and 90-280 mm lens. Individual images in the slideshow are available in my PhotoShelter Gallery.


Early Spring Flowers (landscape mode). Images taken with a Leica SL2 camera and 90-280 mm lens. Individual images in the slideshow are available in my PhotoShelter Gallery.

Daily Electric Energy Used (47.3 kWh) from Sense. Daily Solar Electric Energy Produced (74.5 kWh) from Sense and SolSystems. Sunny. Geothermal HVAC system still on part of the day. A surplus of 27.2 kWh.

One-Year Ago (05-April-2020) — New Jersey

Backyard Springtime Nature in New Jersey

Evening Walkabout: Turkey Vulture. My eBird Checklist.

Turkey Vulture. (David J Mathre)
Turkey Vulture soaring. Image taken with a Fuji X-H1 camera and 200 mm f/2 lens + 1.4x teleconverter (ISO 200, 280 mm, f/2.8, 1/550 sec). (David J Mathre)