Stilt and Avocet nesting

Last month I visited a marsh near my home where American Avocets and Black-necked Stilts nest every year. Both species had been in the area for about a month, pairing up, mating, and preparing the site for nesting. Closely related, these two species often nest in the the area, sometimes laying eggs in the nests of the other species, leaving another parent to raise their young. When I got there, the avocets were either still building nests, or sitting on eggs. One or two lookouts were constantly scanning the skies for predators, turning their necks 90 degrees in order to focus an eye upward.

An american avocet continually watches the skies above its nesting area, looking for would-be predators
An american avocet continually watches the skies above its nesting area, looking for would-be predators. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 400. Evaluative metering 0 EV: 1/1600 sec. at f/8.

The stilts were even more wary, as some of them had freshly hatched chicks. The most common threats were gulls, as they dive-bombed the nesting site. Occasionally a northern harrier would fly overhead, sending the stilts into a panic.

A black-necked stilt continually watches the skies above its nesting area, looking for would-be predators
A black-necked stilt watches the skies above its nesting area, looking for gulls and raptors. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 400. Evaluative metering 0 EV: 1/3200 sec. at f/5.6.

One stilt had three precocious young who were anxious to explore their new surroundings. It was a fairly constant effort to corral them together, and try to keep an eye on three little ones at once.

A black-necked stilt watches over its freshly-hatched chicks
A black-necked stilt watches over its freshly-hatched chicks. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 400. Evaluative metering 0 EV: 1/1250 sec. at f/9.

The chicks were just getting old enough to venture away from the nest to practice feeding on their own. Their unsteady clumsy legs sometimes pitched them sideways into the shallow mud. They would stray from the nest for only a few minutes, at which point they’d turn around and head back, perhaps out of some primal instinct to stay close to a parent.

Two black-necked stilt checks explore the shallow water near their nest
Two black-necked stilt checks explore the shallow water near their nest. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 400. Evaluative metering 0 EV: 1/640 sec. at f/8.

As the sun set, the stilt settled down into the shallow scraping of a nest it had created at the edge of the pickleweed. One by one, each chick would press its way into the feathers of its parent, so it could nest in relative safety.

A day's end, a black-necked stilt cuddles its chick, inviting it to nest within its feathers
A day's end, a black-necked stilt cuddles its chick, inviting it to nest within its feathers. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 400. Evaluative metering 0 EV: 1/500 sec. at f/11.

Finally just one chick remained before it too nestled into the comforting feathers of its parent.

Great Blue Heron Chicks

Two great blue heron siblings huddle together as a strong wind blows across their nest
Two great blue heron siblings huddle together as a strong wind blows across their nest. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 400. Evaluative metering 0 EV: 1/400 sec. at f/8

Recently I joined two photographer friends in photographing two large great blue heron nests. One nest (above) held two relatively young chicks, while the other housed three siblings who were almost ready to fledge. In the smaller nest, the two chicks waited and waited, but I never witnessed a parent return with food. The other nest, however, was a different story.

Three hungry great blue heron chicks eagerly await the return of a parent with food
Three hungry great blue heron chicks eagerly await the return of a parent with food. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 500. Evaluative metering +1/3 EV: 1/2500 sec. at f/6.3

About ten minutes after ariving on site, we were rewarded with a parent’s return to feed its chicks. That was when the aggressive battle began.

An adult great blue heron returns to the nest to feed its hungry chicks
An adult great blue heron returns to the nest to feed its hungry chicks. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 500. Evaluative metering +1/3 EV: 1/2000 sec. at f/6.3

As the parent was trying to regurgitate its meal for the hungry chicks, they took turns squawking in its face, demanding food.

Hungry great blue heron chicks surround the parent, begging to be fed
Hungry great blue heron chicks surround the parent, begging to be fed. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 500. Evaluative metering +1/3 EV: 1/2500 sec. at f/6.3

When it took a while for the food to come up, the chicks got more aggressive. One would grab the parent around the beak, and yank its head down into the nest. When this didn’t work, one of the chicks bit around the parent’s neck and yanked at the throat. I was shocked to see such a display, but figured this kind of behavior fostered some of the competition amongst the siblings that would serve them out in the “real world”.

A great blue heron chick aggressively bites at the parents beak and neck, waiting to be fed
A great blue heron chick aggressively bites at the parents beak and neck, waiting to be fed. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 500. Evaluative metering +1/3 EV: 1/2000 sec. at f/7.1

After the parent finally dumped the food at the bottom of the nest, it took off, presumably to continue to feed these young insatiable appetites. The youngsters continued to battle each other over the remnants until it was gone. The next time you see one of these seemingly docile creatures standing at the edge of a marsh, remember that they are also predators, trying to eke their own way through the world.

Great-Horned Owl Siblings

Two great horned owlets sit side by side on a tree branch. Both have yet to fledge and are awaiting food from a parent.
Two great horned owlets sit side by side on a tree branch. Both have yet to fledge and are awaiting food from a parent. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 640. Evaluative metering 0 EV: 1/400 sec. at f/8

I photographed these two great-horned owlets this past weekend, as they cuddled up together on a branch. They had not fledged, making them easy to find close to their nest. Both parents were still around (as was a third sibling), performing the duties of food gathering for their new brood. Occasionally, the left most owl would become unsettled, and scoot closer to the other, even though his body was already pressed up tight against its sibling. Just as the owl on the right was drifting off to sleep, here comes his brother (or sister), snuggling up close.

After a few minutes, the alert owl decided that it wasn’t time for sleeping, but for a grooming session. With that, he began to lick the other owl’s feathers, rearranging them just so.

While sitting side-by-side, one owlet begins to groom its sibling. Neither owlets have fledged.
While sitting side-by-side, one owlet begins to groom its sibling. Neither owlets have fledged. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 400. Evaluative metering 0 EV: 1/250 sec. at f/8

This continued for quite a while, and I eventually left to see what else I could find. When I returned to the owls, it looked as though the sleepy owl had left and found a quieter place to roost, leaving the alert owl to sit and stare at the world.

A young great-horned owl that has yet to fledge perches on a tree branch, awaiting food from a parent
A young great-horned owl that has yet to fledge perches on a tree branch, awaiting food from a parent. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 500. Evaluative metering +1/3 EV: 1/400 sec. at f/8

I was lucky that these young owls had not yet learned to fly. While they’ll still remain dependent on their parents after fledging, they will be much harder to find among the many trees in the area.

Burrowing Owl

A burrowing owl sits in its burrow surveying the surrounding area
A burrowing owl sits in its burrow surveying the surrounding area. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 200. Evaluative metering 0 EV: 1/500 sec. at f/8

I took this photo last week of a local burrowing owl, whose burrow I had discovered the week before when out scouting with a couple of local birders. Since the light was poor that day, I returned later to get the bird in the nice warm light of sunrise.

I found the owl sitting upright in the burrow, not crouched low as I’ve seen other owls. He seemed quite comfortable with my presence. He was situated on the edge of a golf course, and I was able to photograph him while standing on a paved road, so I’m guessing that he is quite used to people being in the vicinity. I was careful not to approach too closely however, as the too much human contact with a burrow has been known to displace owls permanently. As much as I liked the lighting and the photos, he never did pop out of his hole, and I wanted to try to get photos of him up out of the ground.

A burrowing owl perches on a tree branch above its burrow at sunrise
A burrowing owl perches on a tree branch above its burrow at sunrise. Canon 800mm f/5.6L IS lens with the EOS-7D. ISO 500. Evaluative metering -2/3: 1/250 sec. at f/5.6

I returned two mornings later, this time a half hour earlier, so I could be there for day break. As I approached, I was excited to see the owl perched on a low branch of a nearby tree. I photographed the owl as the sun rose behind me, lighting the bird like a spotlight, while leaving the background dark. In order to compensate for a much brighter bird than the background, I had to dial down my exposure compensation to -2/3 of a stop, so as not to blow out the highlights of the owl.

In order to keep the ISO as low as possible, I opened up to the lens’ maximum aperture (5.6), knowing that with the owl’s fairly flat features, I could still get its entire face sharp at that depth of field. The shutter speed was just fast enough to photograph without needing to lock down the gimbal head of my tripod. However, because my subject wasn’t moving, I didn’t have to pan the lens with the bird, so I locked it down anyway, eliminating any chance of lens shake.

Soon after the photo above was taken, the sun rose higher in the sky and was casting small shadows into the owl’s large eyes. Sometimes the lighting is perfect for a given situation only for a few moments. While the owl was still in the tree at the time I left that morning, I knew it would only be a matter of time before it returned to its burrow for the day.

Copyright 2017 Hank Christensen