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.

Thirteen-Years Ago (25-February-2008) — Colorado

Wintertime Nature at Kelly Place B&B near Cortez, Colorado.

Morning Walkabout: Canada Goose, European Starling. eBird Checklist

Canada Goose. (David J Mathre)
Three Canada Geese in flight. Image taken with a Nikon D3 camera and 70-200 mm f/2.8 lens (ISO 200, 200 mm, f/8, 1/500 sec). (David J Mathre)
European Starling. (David J Mathre)
Three European Starlings in a tree. Image taken with a Nikon D3 camera and 70-200 mm f/2.8 lens (ISO 200, 200 mm, f/4, 1/2000 sec). (David J Mathre)

Wednesday (24-February-2021) — New Jersey

Wintertime Backyard Nature in New Jersey.

Visitors to the birdfeeder: Turkey Vulture, American Crow, Carolina Wren, Dark-eyed Junco, White-throated Sparrow, Song Sparrow.


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

Daily Electric Energy Used (64.1 kWh) from Sense. Daily Solar Electric Energy Produced (32.0 kWh) from Sense and SolSystems. The solar panels mostly clear of snow. Geothermal HVAC system on. A deficit of 32.1 kWh.

Two-Years Ago (24-February-2019) — New Jersey

Wintertime Backyard Nature in New Jersey.

Backyard Birdfeeder: Blue Jay. eBird Checklist

Blue Jay. (David J Mathre)
Blue Jay at the Empty Bird Feeder on a Rainy Day. Image taken with a Nikon D5 camera and 600 mm f/4 VR lens. (David J Mathre)
Blue Jay. (David J Mathre)
Blue Jay at the Empty Bird Feeder on a Rainy Day. Image taken with a Nikon D5 camera and 600 mm f/4 VR lens. (David J Mathre)

Three-Years Ago (24-February-2018) — New Jersey

Wintertime Backyard Nature in New Jersey.

Backyard Walkabout: Red-bellied Woodpecker. eBird Checklist

Red-bellied Woodpecker. (David J Mathre)
Red-bellied Woodpecker in a tree. Image taken with a Nikon D5 camera and 300 mm f/4 lens (ISO 100, 300 mm, f/7.1, 1/320 sec). (David J Mathre)

Five-Years Ago (24-February-2016) — Bay of Bengal

Gone to See the World. Semester at Sea Spring 2016 Voyage on the MV World Odyssey. Day 50: At Sea, Bay of Bengal.


Dawn and Sunrise over the Bay of Bengal. Breakfast Sunrise Club. Individual images in the slideshow are available in my PhotoShelter Gallery.


Food Art — Fruit and Vegetable Carving. Individual images in the slideshow are available in my PhotoShelter Gallery.


Sunset over the Bay of Bengal. Individual images in the slideshow are available in my PhotoShelter Gallery.


Moon rise over the Bay of Bengal. Individual images in the slideshow are available in my PhotoShelter Gallery.


Fritz (Faculity & Life Long Learner Bar. Individual images in the slideshow are available in my PhotoShelter Gallery.