Thinking digitally

A juvenile black-crowned night heron perches among reeds along the edge of a pond
A juvenile black-crowned night heron perches among reeds along the edge of a pond. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 800. Evaluative metering 0 EV: 1/320 sec. at f/8

I little while ago I found myself in a situation in which I could not have gotten the shot I wanted had I been using film. After being tipped off by a friend, I found this nice looking juvenile black-crowned night heron in some reeds next to a pond. The shoreline was such that in order to get the proper frontal lighting on the heron, with a small angle of inclination between the lens view and the ground, I had to be right up close to him. Luckily, he seemed in no hurry to move, nor did he seem to care about my presence. While this distance was great for making tight head shots like the photo above, there was no way I could “back up” and capture any habitat around the bird.

Then I started thinking digitally. I knew that if I was careful in my photographing, I could take multiple photos and stitch them together later, creating the illusion of a wider angle. An added benefit would be a huge image file, which I could later print at very large sizes if I wanted to.

The process of taking the photos was very similar to the process I use for creating stitched panoramas – set the camera to manual exposure, fix the focus so that it is constant for all images, and fire away. The difference was that instead of moving left to right in a single line, my goal was for an aspect ratio close to a normal 35 mm photograph (2:3). In this case, I created two columns of three photos. I didn’t worry about lining up the overlap perfectly – I just eyeballed it.

Note that this only worked because my subject was completely stationary. If the heron was moving at all, the photos would not have lined up well and the stitched image wouldn’t have been successful. It probably took between five to ten seconds to capture all six shots, which I then stitched in Photoshop, creating the 50 megapixel image below.

A juvenile black-crowned night heron perches among reeds along the edge of a pond
Composed of six separate images (two columns of three shots), this stitched photo is 50 megapixels. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 800. Evaluative metering 0 EV: 1/250 sec. at f/8

Even though I found myself in a position where I was “too close” (don’t worry, I’m not complaining – its a GREAT problem to have!), I was able to think digitally to solve my problem. By combining multiple shots, I was able to virtually “back up” and capture a wider shot of the heron.

An unfortunate lover

A pied-billed grebe sinks his head and fluffs his wing feathers in a display of courtship
A pied-billed grebe sinks his head and fluffs his wing feathers in a display of courtship. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 800. Evaluative metering +1: 1/320 sec. at f/8

A couple of weeks ago, I witnessed a pied-billed grebe courtship display for the first time. These tiny birds are already pretty darn cute – but when they are wooing each other, they seem even cuter.

Pied-billed grebe courtship behavior is much more varied and subtle than the extravagant display of other grebe species. It has been witnessed year round, not just during mating season (which this is not.) To impress a female, this male pied-billed grebe ruffled his feathers and sunk his head and neck down flat against his body.

Fluffed wing feathers, sunken head, and calling are all part of the pied-billed grebe's courtship display
Fluffed wing feathers, sunken head, and calling are all part of the pied-billed grebe's courtship display. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 800. Evaluative metering +2/3: 1/400 sec. at f/8

Circling his object of desire, the grebe called out into the air. I photographed this grebe for a short time, until I finally took my eye away from the camera (sometimes photographers can get tunnel vision) to see who else was involved in this ritual. It turned out to be none other than…

A female ruddy duck sleeps as she floats through the water
A female ruddy duck sleeps as she floats through the water. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 800. Evaluative metering +1: 1/320 sec. at f/8

A female ruddy duck! And a sleeping one at that. Apparently she was thoroughly unimpressed with the pied-billed grebes advances. I couldn’t help but feel bad for the little grebe. He was definitely barking up the wrong tree, and wasn’t going to get lucky any time soon.

A confused pied-billed grebe shows his courtship display as he swims circles around a sleeping (and unimpressed) female ruddy duck
A confused pied-billed grebe shows his courtship display as he swims circles around a sleeping (and unimpressed) female ruddy duck. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 800. Evaluative metering +1: 1/200 sec. at f/8

Normally, the next stage in this ritual would be for the female to repeat the behaviors of the male, joining him in calling back and forth. Sometimes the female then flattens herself against the water in a submissive posture, while the male raises his head and neck in a dominant display, referred to as the “triumph ceremony”. However, in this poor grebe’s case, he wasn’t getting the response he desired. After circling the ruddy duck a while longer, he evidently realized his misfortune, packed it in, and swam away.

Herring Gull Reflection (Photo of the week)

A herring gull is reflected in still glassy water
A herring gull is reflected in still glassy water. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 400. Evaluative metering +2/3: 1/3200 sec. at f/5.6

I captured this herring gull last month at Don Edwards National Wildlife Refuge. I had a good combination of nice late-morning lighting, glassy water (creating a mirror-like reflection), and a neat, clean gull.

Gull identification can be quite challenging (gulls and sandpipers give me endless ID trouble!) Certain characteristics to pay attention to include wing tip pattern, eye color, bill markings, and leg color. What really makes gull identification difficult is that fact that you can line up five gulls of the same species, and they can look completely different from one another. Juveniles can have different eye and leg color as their adult counterparts, as well as vastly different feather patterns and coloring. Additionally, breeding season can also change a gull’s appearance. While these same issues exist for many other birds as well, I find them particularly challenging with gulls, as so many gulls look similar.

Sleeping Green-winged Teal (Photo of the week)

A green-winged teal sleeps as it floats, its reflection cast in the still water
A green-winged teal sleeps as it floats, its reflection cast in the still water. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 400. Evaluative metering +1/3 stop: 1/640 sec. at f/5.6

This week’s photo is of a sleeping green-winged teal, as he floated around a local pond along the bay. The green-winged teal is one of the many duck species that winter here, extending the color palette from the ubiquitous mallard. I liked this photo because of its simplicity, and the vivid colors reflected in the water.

Many days I am up at dawn photographing, just for moments like this. Not only is the light warm and slanting in low across the horizon, but water tends to be still and glassy, offering many opportunities for great reflections.

Copyright 2017 Hank Christensen