Sunday, February 24, 2019

Great Backyard Bird Count

Cardinal in crabapple tree

This is the fourth year I have participated in the Great Backyard Bird Count (GBBC), an international event led by the Cornell Lab of Ornithology, the National Audubon Society and Bird Studies Canada.
I look forward to spending a weekend examining the every day birds that visit our backyard feeders. Over three days, I only observed nine species, and of the birds that did stop by, there seemed to be fewer of them. Birds that I have seen in the past that were missing included the Red-bellied woodpecker, sparrows and finches. I am not sure of the reason for this. Could the relatively mild winter have adjusted their range? Or, could the fact that the squirrels devoured most of the fruits and berries from our trees during the fall, and continue to overpopulate our feeders, contributed to fewer birds at our feeders. I do not know.

One species that did arrive in record numbers was the Eastern Wild Turkey which showed up in a flock of 19. This is not surprising, as their numbers in New Hampshire are increasing. According to the New Hampshire Fish and Game winter turkey flock survey, 20,244 birds were recorded in 2018. Turkeys feed on nuts, seeds, fruit and vegetation and like to visit feeders for nutrient rich sunflower seeds.

Female Wild Turkey
Turkey tracks look like arrows going in the opposite direction that the bird is traveling


Our old pear tree harbors a lot of insects. This, combined with a suet feeder, attracts woodpeckers and nuthatches.


        
White-breasted Nuthatch (left) and  Hairy Woodpecker (on suet) and Downy Woodpecker (right)

The photo on the right above shows the size difference between the larger Hairy Woodpecker on the left and the male Downy Woodpecker on the right. We had a pair of each species visit over the weekend. The Red-bellied Woodpecker which has been a frequent visitor over the past few years has not been seen this winter.

Juncos, which are typically appear in groups, were observed, but only one to three at a time.

One lone junco
It was an unspectacular weekend with few sightings, but participating in the GBBC provides an  opportunity to contribute to science by documenting bird populations and their movements. It's also an opportunity to spend a little extra time and appreciate even common birds more fully.

Mourning Dove resting comfortably in the snow.



Tuesday, February 12, 2019

Thousands of Crows Put on a Show

Crows staging along the Merrimack River, Lawrence, Massachusetts
You may not think that spending an evening in freezing temperatures to watch crows would be a desirable activity, but that's exactly what my husband and I did this past Sunday.

A special evening to learn about these corvids was held in Lawrence, Massachusetts and was sponsored by the Merrimack River Watershed Council, Merrimack Valley Bird Club  and Andover Village Improvement Society. It was aptly named "River in the Sky-Our Merrimack of Wintering Crows." The event which quickly "sold out" was attended by a variety of individuals from avid birders to those who were just curious as to why anyone would want to watch crows. Before heading out into the field, we  gathered at the Essex Art Center where a gallery of photos and artwork was displayed. We listened to talks by the sponsors and Craig Gibson, an area photographer and member of the Lawrence "Crow Patrol."  When we saw a presentation given by Dana Duxbury-Fox and Bob Fox, veteran birders who have been observing the crows along the Merrimack River for the past few years.

If you don't already know, crows are highly intelligent, but also very social birds. This is evident in the fact that some migrate hundreds of miles from their summer breeding grounds, to gather in large groups during the winter. These winter roosting sites can number in the tens of thousands. Although these large roosting areas have been documented for centuries, the reasons for this behavior is not well understood. It is believed that one reason they congregate in such large groups is that it provides protection from predators. In recent years, crows seem to be selecting urban areas more for their winter roosting sites. One such city is Lawrence, Massachusetts, where the crows have been returning each winter for numerous years. The Fox's and Craig Gibson have begun to monitor their behavior. You can follow their research and observations at wintercrowroost.com.

Around 4:00 PM we drove to the anticipated staging area, the Abe Bashara Boathouse, 1 Eaton Street. Staging is what the birds do before settling in for their final resting spot of the evening. It provides an opportunity for all the birds to arrive at a central location. This process starts about an hour before sunset and lasts until approximately a half hour after sunset. Although the exact location of where the crows begin staging can change each night, we were fortunate that the boathouse location proved to be the perfect spot to view them on Sunday.
Craig Gibson describes to the group the crows staging behavior
When we first arrived, the first thing we saw were two bald eagles circling overhead. I took this as a sign that it was going to be a good night of bird watching. We saw several eagles after that and for the most part, the crows and the eagles left each other alone. However as dusk approached, groups of crows were seen chasing the eagles away.
Crows and a bald eagle sharing the trees in the early evening
At first, the crows arrived in small groups, but as the sun began to set, they could be seen approaching in waves of hundreds or maybe thousands. Some settled in trees on either side of the river, and some landed on the ice where the river was frozen. It has been documented that the crows are arriving from locations up to 20 miles away, where they have been foraging for food during the day. This is quite an amazing feat when you consider all the energy they must expend to do this.

Most of the crows settled in the trees, but some were more interested in gathering on the ice.
It was fascinating to watch and listen to them, as they were quite noisy, especially when a group  would decide that it was time to move. For some unknown reason, a large group would all take flight at once, circle over the river and then land on the other side.

Trees filled up with crows
We decided to leave before finding out whether or not this would be their final roosting spot, but our frozen toes told us it was time to go. We bid the birds farewell and left with a much better appreciation of these amazing birds and wonder at how marvelous Nature can be. Sometime in March the crows will disperse to their normal breeding grounds, so if you know of a roosting area where you live, I recommend visiting it some evening soon. You will not be disappointed.

Evening sunset colors along the Merrimack River