Owls!

 Owls are one of the most admired and sought after creatures for anyone even remotely interested in nature. As they are mainly active at night-time, finding and seeing them is not always easy, even though some of them are year-round residents. One of my first, quite rare owl species to see and photograph was this Great Gray Owl, which Keith B and I went to see in the GTA back in March, 1979.

 It is very much a northern resident, and a few years later, I got a quick glimpse of one while I was on the Polar Bear Express train on my way to Moosonee. However in January of 2012, one showed up in Essex County, of all places!

 

 It created quite a stir amongst birders and even curious onlookers. As a northern species, it probably didn't know what to make of all the people. It perched right out in the open at times, as the next photo shows. However it did perch in a more natural looking setting, as the previous photo illustrates.

Great Gray Owls are the largest owl species for Ontario, at least in overall dimensions. Snowy Owls and sometimes even Great Horned Owls are slightly smaller, but have more body mass, so can be a little heavier.

A much smaller, and perhaps even rarer owl for southern Ontario that I saw is this next one, a Boreal Owl, that again, Keith and I went looking for in March of 1977. It was tucked away in the branches of a pine tree, and with the bright sky background, made for a difficult photo. Hence this less than ideal photo, a scan from my film days, is just a record shot.

Winter time seems to be a good time for finding owls, especially some of the more northern residents that come a bit south for the winter. Barred Owls are more commonly found here in the south than the first two species shown. There have been a few records, including this next one which Josh P and I discovered on the Blenheim/Rondeau Christmas Bird Count in December of 2018. It was the first confirmed one for this count, although one had been reported a couple of decades earlier.

This one stayed in Rondeau until at least late February, although it moved around a bit and was not always easy to find. There were lots of squirrels to feed on! Plus since it had been seen regularly, the novelty had worn off, and fewer people were out looking for it as time went on. However it was likely gone to its more northern haunts by sometime in March.

 In early January of 2023, another one showed up in the village of Shrewsbury, and initially could be fairly easily seen right from the street in this birch tree.

Again, this one moved around the village a bit, but was seen in various places for at least a month.

Fast forward to late December 2023, and this next one was found in a small pine plantation of a local conservation area not far from Rondeau.

It has been seen fairly regularly, but not by all who have ventured out looking. It will often be fairly high up, and visible only from a certain angle. And getting a good photo isn't easy, as there are often branches in front of it partially obscuring the bird, as well as affecting the focus. It has been present up until at least early February, and could likely remain in the area for a few weeks yet, especially given the fairly intense winter that continues.

In the same general area is this next one: a Northern Saw-whet Owl, which I photographed on the same day as the Barred Owl above.

This one likes to stay well inside a fairly dense pine tree, making nice clear photos a bit of a challenge. Fortunately for birders and photographers, they are more frequently found than any of the ones above, and can sometimes be quite out in the open.

Here is one of the first ones I ever found, in a small pine plantation just west of Cedar Spring, back in February of 1978. This photo was featured on a Nature Canada calendar in 1988.

I've seen a few others over the years in both Chatham-Kent and Essex, with some photographic success.

November, 1987

November, 1990

November, 1987

 Another owl that I photographed on the same day as the Barred Owl and Northern Saw-whet Owl of a few days ago, was this next one, a Long-eared Owl. It was one of two or three individuals, which have been roosting in a stand of White Cedars, but unfortunately are difficult to even see let alone photograph. They are often right up against the main trunk, with lots of cedar branches obscuring them.

 Another owl species that is primarily a winter visitor in recent decades, although there are historical records of them occasionally being present in suitable habitat during the breeding season, is this next one: a Short-eared Owl. They are most often seen in flight during later afternoon, or at least in more subdued light, and not always easy to photograph as they dip and dive in their search for something to feed on.....

...but on occasion, one will be perched out in the open, such as this next one, which I photographed along a pasture on this dull day in January of 2016.

Of course one of the owl highlights that many people look forward to, and have a relatively good success in seeing, is the Snowy Owl. They breed in the very far north, in the arctic lowlands, and every so often they have an eruption year when nesting success has been higher than average, so in the late autumn, they will migrate south where there is a better chance for food.

We usually get one or more on the St. Clair NWA Christmas Bird Count, but not always. A couple of years ago, we had an amazing all-time high of 23 of them! But during the last couple of years, we haven't had any. In fact there have only been a maximum of two reported in the count area this year, and then only for a couple of days before they moved to somewhere else. The dry autumn allowed many farmers to work up the corn stubble and other fields, making the habitat that the wintering owls often hung out in hard to find.

Birds that are almost pure white are adult males....

...whereas ones with a lot of spotting are usually immature birds, or sometimes a female.

Regardless, they are always fun to see, especially if they sit up on a perch with a nice background. This next one was perched on the roof of a small pump house along the roadside.

There are some owl species that are permanent residents of southern Ontario, such as these next two. An Eastern Screech Owl shows up fairly regularly in the cavity of an American Beech tree at Rondeau, providing good looks even from one of the main roads.

And elsewhere, where Wood Duck boxes have been erected, during the winter season, they may be occupied by a Screech Owl.
 

Great Horned Owls, another resident, are quite large, and can be fairly vocal. They can be found in woodlots throughout the southwest and beyond, and sometimes even within urban areas such as this next one, which has occupied a wooded area within the city limits of Chatham.

 They will sometimes nest where a large tree limb has broken off, such as in the crotch of this Willow tree, shown next.

...or sometimes where an entire tree trunk has snapped off, leaving a slight hollow to build their nest in.

This next photo was where a hollow was present in a Black Cherry Tree. The owlets were fairly visible in this setting, as the nest wasn't very deep down.

 After a few weeks, the young will venture out, testing their wings, and eventually trying to make it on their own.

I'm not sure whether the local owls are nesting yet here in Chatham, but if not, it won't be long. Stay tuned!

 

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Birds of Chatham-Kent, Then and Now, Part IV

 

Great Black-backed Gull

Then: it was not considered hypothetical, but Wood had only seen this species on one occasion, and made no reference to it any earlier.

Now: Clearly things have changed. Great Black-backed Gull was considered mainly a north Atlantic region species, but over the years, the species found at least the lower Great Lakes to its liking. It was first recorded on the Blenheim/Rondeau CBC in 1948. Beginning in 1965 it has been seen on every count, with typically up to a dozen or so recorded during the first couple of decades following. The numbers kept increasing, but fluctuated greatly depending on the seasonal weather and the conditions of the day. The maximum number recorded on this CBC was 380, in 1991.

This species is a 4-cycle one, meaning it doesn't attain full adult plumage and breeding until its fourth year. Therefore sub-adults can be found in C-K almost any time of the year, especially if there is some open water. The two photos above show a full adult first, with a sub-adult, likely a first winter bird, below. Both photos were taken in the Jan/Feb period.

Herring Gull

Herring Gull nest, 1987

Then: Herring Gull was considered a common transient and winter visitor, with numbers of non-breeding birds remaining in the summer. Even during the early winter, when numbers were most commonly recorded for the CBC, the maximum number was about 200 in 1939.

Now: Herring Gull is a large, fairly aggressive gull, eagerly defending its food against even other members of its kind, as the first photo shows. The numbers have increased considerably since the writing of Wood's manuscript. Since the early 1960s, seldom are there less than 100 birds recorded on a Christmas Bird Count, and typically there are several hundred. In the last 15 years, the numbers have averaged almost 900 birds, with as many as 3779 recorded in 2008. One of the reasons for this increase may be due to the presence of Ontario's largest landfill just a short flight away.

Herring Gull has become an occasional breeding species as well. When the water levels of Lake Erie are such that the south beach of Rondeau is a good breeding site, gulls can occupy parts of it, as the above photos show. The middle two photos were taken in June, 1987, while the fourth photo was taken in May, 2013. The latter one wasn't on the south beach, but was taken from my kayak while I was exploring some of the exposed small islands at the south end of the marsh.

Ring-billed Gull

Then: Ring-billed Gull was considered a common spring and fall transient and a summer and winter visitor. Up to 30 birds were reported periodically in spring and fall, with late fall being the time when the largest numbers were recorded. Up to 75 birds were recorded for the first few Christmas Bird Counts.

Now: as with the previous two gull species, the numbers have changed considerably. It is typically the most abundant gull species most of the year. The same CBC in the last 25 years has averaged over 3300 birds, with a high of 12510 recorded in 2001. One of the reasons for this increase may be attributed to Ontario's largest landfill just a short flight away.

When conditions are suitable along the south beach of Rondeau as a nesting site, they will use it as the above photos show. The first and third photos were taken in July, 1983, while the middle photo was taken in June, 1987. 

Forster's Tern

Then: Forster's Tern was considered to be formerly a common summer resident at the St. Clair flats, but at the time of writing (1945), a very rare visitant. There was only one record for this species at Rondeau, that being May 13, 1946.

Now: It is a regular, but not abundant migrant present in spring, summer and autumn. When the marsh water levels are suitable, it has been known to nest, with the first known nesting occurring in about 1980. The nesting photo above was taken in July, 1981. Forster's Tern is generally considered a mid-western species, but with some local habitats in the vicinity of Lake St. Clair showing similarity to the tallgrass prairies and wetlands of the mid-west, this species and others have been known to occur and breed in C-K with some regularity. With Rondeau being a bit farther east, such mid-western species are generally less common either as migrants or breeders.

Common Tern

Then: Common Tern was considered a common summer resident, breeding in colonies on a sand spit in the McGeachy Pond area near Erieau, as well as being fairly abundant in the marshes along Lake St. Clair. Flocks of two hundred were seen foraging along the water. However in several cases some of the eggs have been lost to Herring Gulls, Bonaparte's Gulls and skunks.

Now: While Common Tern is quite regular and sometimes fairly abundant in Chatham-Kent, nesting has diminished substantially. I have seen an occasional nesting attempt along the south beach of Rondeau a few decades ago, but no one has reported them nesting anywhere in recent years. There were no confirmed breeding records in C-K in either of the first two OBBAs, although they did rank as 'Probable' in two squares at Rondeau. The changes are likely the result of three things: (a) a large increase in gulls, which are predatory; (b) the higher water levels of Lake Erie, making nesting sites less available; (c) the increased usage of boaters illegally using the south beach, causing disturbances.

Black Tern

Then: Black Tern was considered a common summer resident, breeding in all the large marshes of the county. An average of about eighty birds were reported at Bradley's marsh in the early part of last century, and was considered more abundant than Common Tern.

Now: In the Rondeau/Erieau area it is regular, but not common at any time. The two photos showing Black Tern nesting were taken in the late 1970s and very early 1980s. The upper one was taken at McGeachy Pond; the lower one was taken at the south end of Rondeau. The water levels at McGeachy Pond used to naturally fluctuate, allowing for functional habitat, but about thirty years ago, a water control system was put in, so the habitat has declined. 

In some of the larger marshes along Lake St. Clair, it is more common, but certainly not abundant. Eighty birds would be a huge increase nowadays! During the second OBBA, there were 5 squares in C-K that had this species 'Confirmed' breeding. There are likely several reasons for the overall decline: (a) high water levels thus reducing cattail habitat; (b) a huge increase in the extent of highly invasive Phragmites, choking out some of the high quality habitat Black Terns prefer; (c) some relatively minor loss of habitat due to farming.

American Barn Owl

Then:  The American Barn Owl was considered a permanent resident, and the first Ontario nesting record was at Charing Cross. Wood goes on to give details of other records of them nesting, being shot, or being observed, at many locales in C-K.

Now: a very scarce, very occasional resident. I have seen it on a couple of occasions, once at Shrewsbury in 1973 and near St. Clair NWA a few years ago where one was seen periodically by various people over the course of about three years (2006-2008). We managed to get it on the St. Clair NWA CBC those three years. I do not have any photos, other than in my memory. In spite of searches, its roosting spot was never determined. There have been a few other records in C-K over the years, but details have been kept quite secret due to the potential disturbance by numerous birders who would descend on them in order to add the species to their life list.

Snowy Owl

Then: Considered an irregular winter visitant, but the numbers fluctuate. Even as recent as in the first part of last century, birds of various species were shot for the taxidermy trade, or whatever, and this owl species was a common target. Wood goes on to say that the winter of 1945-46 was the heaviest visitation in recent years, and " Twenty birds were definitely known to have been shot in the vicinity of Chatham and hunters told of many others killed and left in the fields." An unfortunate entry.

Now: up until recently the species was still considered an irregular winter visitor due to the cycle of breeding success, which in itself, was based on the population of lemmings and other rodents available to them during the nesting season. Abundance of food was a critical factor in the courtship display and therefore nesting activity and success. When larger numbers of young were raised, more would migrate south to survive the winter. Those cycles continued, more or less, up until 2010, where for the St. Clair NWA CBC, 1-3 birds would be seen in successive years, and then missing them for one or two years. However beginning in 2011, Snowy Owls have been seen each year, with sometimes a dozen or more birds being counted. The 2022 CBC had an incredible all time high of at least 23 owls recorded. The Blenheim/Rondeau count has shown a similar trend, although overall in smaller numbers except for an amazing 26 birds reported in 2014. This trend begs the question of what changes occurred in their breeding territory to presumably make their food source more readily available.

Short-eared Owl

Then: This species was described as an irregular winter visitant and very rare summer resident. However there were some incredible numbers given for them at times, as about 50 were reported at St. Luke's Marsh (immediately to the north of SCNWA) in March of 1940, and in January of 1943, there were about 100 birds reported there! There was only one confirmed nesting record known at the time, in June 1944, in a large pasture in the former Raleigh Township.

Now: While Short-eared Owls continue to appear in late fall, through the winter and into early spring, it is rare to see even one bird without a lot of effort during those times. Clearly their numbers elsewhere have fallen off so that there are few to appear in C-K during these non-breeding seasons. Getting 1-3 birds is at best, the norm for CBCs in the area, and in some years one does not get them at all. There have been some blips in these numbers, as an amazing 24 were tallied on the Blenheim/Rondeau CBC in 2010.

There is breeding habitat present, especially in the vicinity of the larger marsh complexes associated with Lake St. Clair. The amount of pasture or hayfield habitat elsewhere in C-K has declined in the last few decades, although some remains. However there have been no breeding records at any level for either of the first two OBBAs.

Chuck-will's-widow

Then: considered hypothetical, based on a single encounter in a woodlot in the former Raleigh Twp in 1920.

Now: Currently a very rare species, although in the late 1970s and early 1980s, it was heard and seen annually at Rondeau. Indeed on one occasion there were up to 7 birds calling at various places along Harrison Trail both north and south of the Visitor Centre. It is believed that at least some of those birds were the progeny of the previous year or two. However in spite of efforts to try and locate any nesting evidence, this very cryptic species was never confirmed. There have been occasional records since that time, but very rarely, and almost entirely in May/June.

Whip-poor-will

Then: Considered as a common spring and fall transient and a rare summer resident.

Now: It is a regular spring migrant, but never common. A few can be heard under the right circumstances at Rondeau, for a couple of weeks in late May/early June. On occasion one or more will continue well into the breeding season, as they can be heard from the wooded ridges east of the Marsh Trail as well as along Harrison Trail. No doubt some have attempted to nest, perhaps successfully, although confirming this crepuscular creature would be difficult. The above photo was taken on Nov 4, 2012, of a bird high up in a White Pine along the South Point Trail. It is late in the season for an insect eating bird!
  

Common Nighthawk

Spring migrant

Autumn migrant

Then: it was considered an abundant summer resident, commonly nesting on flat, tarred and graveled roofs in cities and towns.

Now: while it is a regularly occurring species, it is anything but abundant. The open pine forests they breed in farther north are not available to them in C-K, so any attempts at breeding would still require the flat, tarred and graveled roofs. One used to be able to detect their 'boom' in the evening in cities and towns but not recently. Undoubtedly a few spring arrivals remain to at least attempt to nest. There were several atlas squares in both of the first two OBBAs recording them up to the 'Probable' level, but no 'Confirmed' records. Common Nighthawks are typically a bit more common in the autumn as they migrate southward from more productive breeding grounds.

 

Birds of Chatham-Kent, Then and Now, will continue in a future post.

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(Mostly) Bird highlights of late January

 Since winter hasn't gotten all that vicious yet (and hopefully won't get too vicious!), there are still birds around. Some which you expect, and others that definitely aren't normally here.

Water birds are the most likely to be found. Along the Lake Erie shoreline, flocks of ducks are regularly noted flying by, usually well out of camera range. Mergansers, bot Common and Red-breasted, are still around in good numbers, as are some scoter species.

Common Mergansers

Most Wood Ducks are long gone by now, but this one is hanging around the Thames River with several dozen Mallards, feeding on things that people put out for them on the river bank.

A water bird that really shouldn't be here, but four of them were still around a few days ago, is the Great Egret. When I was out to the Jeannette's Creek boat launch on the weekend, I saw not one, but all four of them. Three were together, but one left when I stopped the vehicle, with camera in hand.

I caught up to the fourth one a little way down the mostly frozen canal.

Snowy Owls have become more reliable in the last dozen or so years. It used to be quite a novelty to see even one other than in an irruption year. At least in the former Dover Twp, it isn't all that hard to find at least half a dozen on any given day, as long as the landscape remains fairly snow free.

Still on the subject of owls, I roamed around the Blenheim Sewage Lagoons yesterday to see if I could scare up a Short-eared Owl that had been reported from time to time. After a lot of walking to check the berms and grassy fields, I did literally scare one up. And immediately the crows in the area noticed, and began mobbing it. The owl climbed higher and higher and eventually I lost sight of it. Due to the heavy overcast, I only got a couple of record shots, shown here, and even these have been greatly processed and then cropped to the equivalent of about 85X.

These three muskrats didn't have to worry about the owl or the crows, it seems, as they were busily feeding on some vegetation at the edge of one of the cells.

Roaming around Rondeau hasn't been especially birdy lately, although it is still great for a nice vigorous and refreshing hike. As in previous visits, one sometimes is lucky to see more than one species per kilometre of walking. But on occasion, one will encounter a flock of sparrow types which are worthwhile checking over carefully. Most will be American Tree Sparrows, but sometimes a lingering Chipping Sparrow or Field Sparrow will be mixed in. I came across a couple of different flocks of sparrows in the park, and each one had two or three Field Sparrows, as in the following photos.

Next up, I plan to feature Northern Bobwhite!