Showing posts with label MOTUS tower. Show all posts
Showing posts with label MOTUS tower. Show all posts

Friday, August 11, 2017

Radio Tagging Barn Swallows (Hirondelles rustiques)

09 August 2017

     Having installed our Motus tower at SpruceHaven several months ago we were very excited when the day finally arrived when we would attach radio tags to ten Barn Swallows (Hirundo rustica)



     Greg Miller, a research scientist with Environment Canada, and the lead figure in this project, arrived to install the tracking devices and he wasted no time unloading his car to get started on the task at hand.




     The device is incredibly light, weighing a mere 0.29 of a gram. When you put it in your hand you can barely even detect it is there. Here is Dave holding one. The loop is the little harness that will hold the tag onto the bird, until it degrades and falls off several weeks hence.


     Mary and Judy had come out as observers, but wasted no time in rendering whatever help was needed. 





   
     More than one pair of hands makes the work of assembling the nets used to trap the birds much easier.



     In fact it proved invaluable to have Judy and Mary there when the batteries on Greg's scale failed, rendering it impossible for him to weigh the birds. Without a moment's hesitation they jumped in their car, scale in hand, to head into town to get replacement batteries. They were back in short order, functioning scale in hand, and their prompt action saved the day!
     Heather and Daina, the two dedicated young biologists who devote so much time to our mist netting operation, and also helped us to monitor the swallow nests throughout the season, actually arranged to get a little time off work to come and help.



     I am not quite sure what everyone was focused on here but it was sufficiently important to channel everyone's attention in the same direction.



     Heather and Daina not only work hard with dedication and finesse, they also obviously enjoy every minute of what they do.



     The pleasure in being around these young people is immeasurable and is a source of constant joy for me. As I get older I know that there are new champions for wildlife following in our footsteps, with knowledge, enthusiasm and commitment to fuel their passion for the preservation of ecosystems, where wild creatures are valued as an integral and essential component of a healthy environment.



       It was a major help to have two extra bodies to retrieve the birds from the mist nets, leaving Greg to proceed with banding, measuring and equipping the birds with their tags.





  
     Greg did the final calibrations on his equipment  and checked each tag to ensure that everything was functioning properly before installing them on the birds.





     We found Greg to be a very agreeable fellow and were grateful that he took the time to explain everything he did and answer any and all questions we had.



     Here he is measuring the wing on one of the birds.



     Mary and Judy were taking a lot of the pictures for us and had me pose with Daina and then Heather to record the confluence of the young and the beautiful with the old and not so beautiful!




     We were able to trap the birds very quickly as they flew into the net in the gloom of the barn and all were banded, even the ones not receiving radio tags.



     Do you get the impression that Heather is a tad engrossed in this operation and that Greg is ever patiently explaining everything?



     Here a tag is being installed onto an adult bird.



     It was incredible to me how quickly and smoothly Greg accomplished this. It seemed to be done in no time at all, and I found it more than a little whimsical that an essential tool in this arsenal of high tech apparatus was an old-fashioned crochet hook!
     VoilĂ ! The operation is complete.



     Complete details on weights, measurements, age, moult, tag number etc. are recorded for each bird and Daina was first in line to help.



     We tagged five birds at SpruceHaven and then moved over to the colony at  the second farm we have monitored to tag five birds there. Photography was very difficult there as the barn is quite dark, and we deliberately left the lights off so that the net would not be visible to the swallows. 
     The horses were not happy about being escorted out of the barn since their desire for attention rivals a pet dog. At one point Heather stood guard to keep them outside. Had they been able to re-enter they would certainly have destroyed our net.



     Greg was anxious to position the net exactly the way he wanted it.



     The birds were processed quickly and a good day's work was completed in near record time.



     This operation really represents the culmination of all we have done to try to help these endangered aerial insectivores. We hope that the tags will help us to understand how land cover composition and land use practices influence the diet and condition of fledglings. Valuable information should be gleaned on where adults and juveniles move post breeding, and when adults and juveniles initiate migration. Little is known of the routes Barn Swallows take as they leave the province and head south and we should be able to add measurably to our knowledge of this phenomenon.
     I owe a great debt of appreciation to Greg Mitchell for his kindness and professionalism, to Heather and Daina for being determined to participate at all costs, and to my dear friends Judy and Mary who are always there to encourage and assist. And of course, none of this would have been possible without the support of cooperative landowners, and the substantial financial commitment of Dave Westfall. I salute Environment Canada for its commitment to the welfare of endangered wildlife.
     It has been an honour for me, in fact a life time achievement, to have been permitted to engage in this venture. I am humbled by the birds and their epic struggle for survival, and for the friendships built up with fellow swallow enthusiasts. 
     It is ironic that in the midst of this ultra high-tech operation, I came across a simple poem about Barn Swallows, composed by Vera Ernst McNicol, before 1956. Vera was a well known local area poet, in a day when poetry was still read by many and she published several volumes. She actually lived in the farm house on the Fourth Line of Peel Township where Miriam was raised before Miriam's parents acquired it, and some of the poems are dedicated to Miriam's father and mother, Eli and Vera Bauman.
     Vera's poems are not the kind to win Pulitzer prizes, or provoke highbrow discussions of form, structure, purpose and philosophy; rather they represent the poetic equivalent of folk art, highly expressive, but based in a simple, down-to-earth tradition. I find this poem quite charming in its own way, and it certainly reflects the joy I feel when the first swallows return in the spring. I hope that you will enjoy it as much as I did.


The Little Barn Swallow
The winter months seemed lonely
Without the swallows in the shed.
With the first approach of autumn
These little birds had fled,
But the warm, coaxing April breezes
Recalled these harbingers of spring,
And now gaily in the barnyard
You may see them on the wing.

Back and forth above our heads
These swallows glide and skim.
Down to the ground they slowly dip,
Then rise again with vim.
At times they light upon a wire,
Big, black beads upon a string,
But they seldom linger long
To idly sit and swing.

They have urgent work to do,
These busy little swallows.
They carry material for their nest,
From hillsides and from hollows.
High on a beam it is fastened, 
This quaint little cradle of mud,
And four tiny eggs are laid inside
When the trees begin to bud.

One swallow hovers close by,
While the other searches for food,
Darting here and there in the meadow,
She swiftly returns to her brood.
The baby swallows grow quickly,
And the nest is empty once more.
Proudly they flit with their parents, 
In and out of the cow stable door.


Thursday, April 27, 2017

Installation of a MOTUS Tower at SpruceHaven

26 April 2017

     Late last year Dave Westfall agreed to fund the installation of a MOTUS tower at SpruceHaven with a view to radio tracking our Barn Swallows Hirundo rustica on their journey south. Not only would this enable us to monitor the progress of swallows breeding at Sprucehaven it also provides a critical link in facilitating the tracking of other species fitted with appropriate devices. Our tower will plug a gap in the existing network of towers enabling more precise data to be gathered.
     It truly doesn't get much more exciting than this!
     Zoe Crysler of Bird Studies Canada and her sidekick, Sean, made an appointment to come and install the tower, and along with Sandy, I was happy to greet them and show them where the tower was to be located. The following picture of Sean, Zoe and Sandy memorializes the event.


     The ground behind them would soon be transformed.
     Zoe and Sean began to transport the various components from their van to the site and it became obvious from the getgo they had done this before.


     In no time at all the main support structure was erected. At this stage it looks like a giant tripod!


     Work continued apace with every sequential operation performed with alacrity and skill.



     A recalcitrant bolt slowed down the operation for a few minutes, but between them Zoe and Sean managed to get it free so that the assembly could continue. You can see the determination on Zoe's face.


     I was happy to watch the assembly take place and Zoe was always willing to answer any questions I had and to explain the various components and their role in the overall operation of the tower.


     Sean took care to carefully position and drive in the stakes which will ensure that the tower remains upright, even in the event of high winds. Zoe mentioned that they have only had two towers ever go over. As a precaution towers are lowered before the onset of winter storms.


    We were now at the stage where the components vital to the receiving aspect of the tower could be installed.


     Zoe seems to be in her element making sure all this technical wizardry is installed exactly as it should be.



     Finally all was completed.



     We will be getting a brand new, state-of-the-art computer for our tower and Zoe will be returning next week to install it.
     For all who are involved in this operation, this is a unique opportunity afforded to few, to get involved in monitoring endangered aerial insectivores with the aim of discovering opportunities to help their populations to recover. We will know where the birds go in real time and will learn myriad aspects of their feeding strategies and opportunities, obstacles encountered in migration and a whole host of other facts, some of which we may not yet be able to conceive.
     Dave, Sandy and Jamie have already become conservation heroes; this can only serve to enhance their status as champions for wildlife. I salute them all.

Land Acknowledgement

We acknowledge that the land on which we are situated are the lands traditionally used by the Haudenosaunee, Anishinaabe, and Neutral People. We also acknowledge the enduring presence and deep traditional knowledge, laws, and philosophies of the Indigenous Peoples with whom we share this land today. We are all treaty people with a responsibility to honour all our relations.

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