Highlights of the Manitoba Breeding Bird Atlas to date

After only three years of fieldwork (2010, 2011, 2012), the Manitoba Breeding Bird Atlas (www.birdatlas.mb.ca) is already turning up plenty of surprises. This post offers a glimpse into what we are finding thanks to:

   870 registered volunteers, who have put in
   over 21,000 hours of survey effort consisting of
   over 160,000 records of
   287 species breeding in
   over 2100 atlas grid squares (a grid square is 10 km X 10 km)
   and with over 16,000 point counts in over 1,100 squares….

For a “small” province like Manitoba (in terms of human population), chalking up this much effort is a phenomenal achievement and we have two more years to go to get even better!

Some of the biggest highlights to date have been confirming four species breeding in the province for the very first time! In 2010, Ken De Smet found a nest of Black-headed Grosbeak and David Raitt confirmed breeding Western Tanagers for the first time in Manitoba. The two photos below are ones I took recently in Manitoba. All the photos in this blog post are mine but you can view the photos of other atlassers at: http://birdatlas.mb.ca/mbdata/photos.jsp?lang=en

In 2011, Ken De Smet found Manitoba’s first nest of Snowy Egret and apparently only the second breeding record in Canada. The nest was at Whitewater Lake where I took this photo.

In 2012, there was a rash of Long-tailed Jaeger reports. I found three pairs near Schmock Lake just south of the Nunavut border (photos below) and Joel Kayer and Ken De Smet found a nest at Nejanilini Lake – the first confirmed breeding in our province! 

There were some other great finds too; for example, the Wapusk National Park survey team (a joint effort of Parks Canada and the Manitoba Breeding Bird Atlas) found three Golden Eagle nests along the Broad River. These are the first confirmed Golden Eagle nests in Manitoba in over half a century although there are other unconfirmed reports.   

This male Lazuli Bunting has been on the same territory in southwestern Manitoba for three years in a row. Unfortunately, we have yet to confirm breeding although there have now been some sightings of a female.

In addition the headline makers, the atlas has produced a plethora of excellent nesting records from many out of the way places. These two photos show a Red-throated Loon and nest – this nest I found this summer was the first of two found to date.

Some waterbirds such as American White Pelican (found well north of known colonies) and others like Red-winged Blackbird have been found farther north than expected. What we don’t know is how much of this represents northward expansion or just lack of previous data in remote areas.

A suite of species normally associated with deciduous woods or mixed forest along the aspen parkland to southern boreal transition zone such as Eastern Bluebird, American Woodcock, Eastern Whip-poor-will, and Black-and-white Warbler (photos below) have also been found farther north than is indicted in guidebooks. One possible explanation may be related to habitat change associated with human land clearance in the boreal that has enabled disturbance adapted deciduous trees (especially poplar family members such as Trembling Aspen) to colonise areas following human disturbance, resulting in movement corridors for deciduous forest species. In other areas, however, we have found these species in the north in relatively undisturbed areas such as Black-and-White Warblers along the God’s River and even as far north as York Factory! 

The atlas has documented a better picture of both Northern Parula and Pine Warbler (photos below) which are typically thought of as occurring only in extreme southeastern Manitoba but which we now know have small breeding populations in the Interlake region.

Some boreal forest birds also seem to be moving north including Winter Wren and Brown Creeper. Both of these species have now been recorded several times in the Churchill area (well north of typically drawn ranges).

The atlas is not just finding northern movements however. Some species such as Bonaparte's Gull have been documented farther south than previously thought. This is a juvenile Bonaparte’s Gull shown here. Other species such as Tundra Swan, Northern Shrike and Pine Grosbeak have also been recorded south of their typical ranges.

The atlas is also gathering a lot of much needed data on species that are poorly known or for which there is anecdotal evidence of decline. For example, Smith’s Longspur, Lapland Longspur and Harris's Sparrow (photos below) have all become much more difficult to find in the Churchill area in recent years. Nonetheless, the atlas has been documenting these species in reasonable numbers elsewhere in the north. The last photo in the series of four below shows a rarely encountered Harris’s Sparrow nest.

The atlas is procuring fantastic documentation on Species At Risk in our province and working hard to augment the Manitoba Conservation data Centre. This juvenile Rusty Blackbird (just out of the nest) is one example of many Species At Risk records the atlas has documented to date. Rusty Blackbird is listed as Special Concern. 

In some cases, we have special projects occurring within the larger atlas framework. This includes the ongoing Bird Studies Canada Golden-winged Warbler Project I began in 2008 thanks to the Walter Siemens Memorial Fund. Golden-winged Warbler (photo below) is listed as Threatened. Other researchers also share distributional and nesting data with the atlas.

And then of course there are the hundreds of personal stories that make the atlas what it is. You can read about many of these stories in the various issues of the atlas newsletter at: http://birdatlas.mb.ca/newsletter_en.jsp. I will leave you with one of my favourite magic moments from atlassing in northern Manitoba – this young Boreal Owl that I found (along with other family members) near Shamattawa, Manitoba.

To learn more about the atlas, you can contact me by email at: cartuso AT birdscanada DOT org or phone 1-800-214-6497 and ask for the Manitoba Breeding Bird Atlas.  Thank you!

Hudson Bay Coast

We finish this series with a few images from the Hudson Bay coast – an area of exceptional interest and beauty and a place of stark contrasts, especially from winter to summer…  compare, for example, these two photos of ice in the bay in late June and then a Whimbrel on lichen-covered rocks in mid July! The landscape changes from black and white to colour and back, seemingly in the blink of an eye!

It is not often I get to see a species of mammal in Manitoba that I have never seen before but this “sik sik”, a.k.a Arctic Ground Squirrel was a first for me. This species reaches the southern limit of their distribution at the north bank of the Seal River and are hence not found in Churchill. They were easy to see around the Seal River Heritage Lodge.

Although always a treat, this year the Beluga put on a particularly excellent show, swimming close to shore on a near daily basis. The following series of four photos shows some of their antics near the surface (the darker animal in the last photo is a youngster) 

Along the coast, one sees lots of Parasitic Jaeger. I found it intriguing that I would see only Long-tailed Jaeger at inland tundra sites, whereas the larger and more robust Parasitic Jaegers dominated the coastal strip. It will be very interesting to see how the distribution of these species falls out when we complete the Manitoba Breeding Bird Atlas (Www.birdatlas.mb.ca). You can study the differences between these two species by comparing these photos below with the Long-tailed Jaeger photos in my previous post.

Many waterfowl utilize the coastal strip too – here are a handful: a flock of White-winged Scoters, a female Black Scoter, Long-tailed Duck, Greater Scaup, Common Eider with young and a young Northern Pintail. 

Hope you enjoyed this brief addition to the previous posts of Manitoba’s northern birds!

On the Open Tundra

Moving away from the treeline into the open tundra brings with it a lot of excitement for those of us who live in the south and don’t get to see tundra birds in their breeding habitat very often. Of course, one has to come prepared for the bugs, which can be absolutely horrendous up here… you get a SMALL sense of this in the photo below where I forgot to fan the air before taking a habitat shot…

(and that’s just the ones around the camera – there were many, many more around me!)

After wading through the numerous floating sphagnum bogs of the central boreal forest for much of June, the tundra offered the relief of walking across more open country  and I was greatly looking forward to that. However, it was not all easy as, especially around Seal River, I encountered many large willow swales that had to be negotiated, including a lot of weaving and swimming through the dense branches. After getting cut up and my clothing ripped I eventually lost a few toques and a mosquito jacket thanks to those willows. So much for easy walking! The other promise of easy walking that the tundra offers is embodied in the word “permafrost” – even when traveling through the dens of the Hudson Bay lowlands, you never sink to the same extent that you do in the boreal biome because usually the ground is permanently frozen justa  few feet below the surface (although in reality the permafrost is not evenly distributed). As anyone who has read anything about global climate change will know, changes to the permafrost are occurring across the north and could have huge knock-on impacts for wildlife and humans alike. Around the Seal River, I found several places where the permafrost was exposed, such as seen in the photo below where a chunk of soil and debris had broken off.

 

One of the biggest pieces of news from the Manitoba Breeding Bird Atlas (www.birdatlas.mb.ca) summer season was confirming Long-tailed Jaeger as a breeding species in the province for the very first time. Ken De Smet and Joel Kayer found a nest at Nejanilini Lake and I found three pairs near Schmock Lake. These are both inland tundra sites as opposed to the much more visited coastal tundra sites and could explain why they have flown under the radar for so long. As Long-tailed Jaeger are said to be less kleptoparasitic (steal food from other birds such as gulls and terns by forcing them to regurgitate their catch) than the Parasitic Jaeger that breeds regularly in Manitoba’s coastal tundra, they may be more confined to inland tundra away from the larger and heavier Parasitic Jaegers and where they can capitalize on lemmings and such. Having said that, there was no real evidence of a lemming peak in northern Manitoba this year and other lemming opportunists like Snowy Owls and Rough-legged Hawk were not found to be breeding.  We just have to keep going north to determine how common these birds are and what their breeding distribution in Manitoba looks like but we now know that they do breed, at least occasionally, in several locations in our province. So here are a series of photos of some of the pairs that I found at Schmock Lake, perched and in flight and from various angles and showing them in their habitat sailing across the open tundra with true poetry in motion.

For the benefit of those Manitobans who don’t see this species very often, the Long-tailed Jaeger features to look for in the photos below include:

• VERY LONG tail (the most obvious feature but from some angles parasitic can surprise you with a longish tail and Long-tails can have missing or broken tail feathers)
• evenly brown underwing with lack of strong white crescent as shown in adults of other jaegers and juvenile Long-tails too
• fine black line along trailing edge of upper wing (and underwing) that contrasts with the pale brown wing and mantle (Parasitic also shows a dark trailing edge but with much less contrast to dark brown of wing and Pomarine is even darker still with even less contrast)
• buoyant flight style (not so visible in still photos)
• clean white breast lacking smudgy brownish breast sides or near complete smudgy breast band as in other jaegers
• grey flanks and lower belly bleeding upwards towards clean white breast but lacking a clear demarcation from the breast (Parasitic usually shown dark undertail coverts clearly demarcated from white belly)
• pale grey legs (not as dark as other jaegers)
• short, all dark bill (but with long nail) – the bill is shorter than Parasitic’s and lacking the pale coloration at base of bill typically shown by Parasitic or the bicoloured bill of Pomarine

got that…. So look for those features in the photos below (I’ll post some photos of Parasitic when i blog about the coastal tundra)

 

One of my favourite aspects on the tundra is all the breeding shorebirds to be found. This next series of photos shows some of these in their tundra habitat. It is hard to say why I love them so much but it probably has something to do with their magical display flights and songs; raucous behaviour when you pass through their territories, often perching in trees wherever these are available so their calls carry further; and their stunningly beautiful plumage, be it cryptic or colourful, that is always breathtaking. Enjoy this series of the shorebirds that breed in Manitoba’s tundra (in no particular order)…

We start with one of my absolute favourites, the American Golden-Plover, a magical combination of crypsis and contrast, of camouflage and colour.  Their distinctive whistled call wafting across the tundra is a little bit magical and a photo doesn’t do it justice but nonetheless here is a photo of a calling bird in their tundra habitat followed by a close up.

Likewise, the beautiful Stilt Sandpiper, with their unique banded plumage. Here again are two photos, the first showing a Stilt Sandpiper in their tundra breeding habitat and the second a closer photo showing the beautiful chestnut coloration of the bird’s breeding plumage…

And why not show the same for the cryptically plumages Whimbrel, another awesome tundra denizen…

There is a great deal of variation in the sandpiper family, from the large Whimbrel to the tiny Least Sandpiper, shown here. The first photo shoes a Least Sandpiper in breeding habitat on the tundra, the second photo shows a bird giving a distraction display to draw me away from their nest, and the third shows one squawking at me from a lone tundra tamarack in protest of my presence. Trees are such a valuable resource up here because itf you want to broadcast a territorial call far and wide they offer an energy efficient way of sending your message FAR (as I have blogged about previously) so it is not uncommon to see many shore birds species in trees on the breeding grounds where trees are available of course.

Other shorebirds that breed up here include the Dunlin, Short-billed Dowitcher and Red-necked Phalarope as shown in that order in the three photos below…

And lest I forget another little beauty – the Semipalmated Plover. This sequence below shows two different individuals in distraction display, feigning a broken wing to draw my attention away from their nest or babies; followed by some photos of the babies stumbling in the grass and trying to hide in the open before running back to hide under the breast feathers of mom or dad… very adorable but i had to leave quickly to avoid stressing the birds and never got the photos i really wanted to them sticking their heads out… 

One big part of this year’s success was the numerous nests I found in northern Manitoba. Here, in addition to the ones I showed in the last post, are a few examples. We start with the big one for me – the first time in my life I have found the nest of Red-throated Loon and the first confirmed breeding of this species for the Manitoba Breeding Bird Atlas (www.birdatlas.mb.ca). The first photo shows the nest (not much of a nest really, just an egg laid in a depression) and the then the owner (actually the photo is of a different individual but once again, I had to leave in a hurry and decided not to return to the nest site as I was doing survey work and did not have a hide / blind with me).

Here are some more example – see if you can identify the nest before you look at the subsequent photo of the nest maker!

Did you get that?? They were:

Willow Ptarmigan nest up close

Willow Ptarmigan nest in surrounding habitat (did you spot the eggs?)

Willow Ptarmigan

American Black Duck nest (I tried to trick you by not showing the bird)

Horned Lark nest

Horned Lark

Savannah Sparrow nest

Savannah Sparrow

The Savannah Sparrow nest is intriguing. I flushed a Savannah Sparrow off this nest and the eggs for the most part are consistent with Savannah Sparrow; however, I still am uncertain about the identity of the pale bluish egg that accompanies the brownish Savannah Sparrow eggs…. Anyone with any thoughts on this, please get in touch!

Off to the coast in the next post!