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Cette page de nouvelles publiera principalement les rapports hebdomadaires de nos activités de baguage – plus occasionnels d’autres articles d’intérêt général.

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Week 9 (September 26 – October 2, 2015)

 
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The arrival of the first Orange-crowned Warbler of fall on September 30 matched the record late date established in 2008; this individual (possibly the same bird) was banded the next morning (Photo by Simon Duval)

The arrival of the first Orange-crowned Warbler of fall on September 30 matched the record late date established in 2008; this individual (possibly the same bird) was banded the next morning (Photo by Simon Duval)

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THIS WEEKTHIS FALL2006 TOTALSITE TOTAL
# birds (and species) banded174 (34)1986 (75) 3472 (86)56679 (119)
# birds (and species) repeat 39 (11)453 (37)761 (57)11462 (85)
# birds (and species) return 2 (2)49 917)175 (32)1847 (51)
# species observed 77131156213
# net hours 486.04664.48154.7111035.0
# birds banded / 100 net hours 35.842.642.550.9

Bander-in-charge: Simon Duval, Gay Gruner.

Assistants: Angelika Aleksieva, Pascal Berthelot, Zoe Bonerbo, Alexander Boyer, Martha Bromby, Mathieu Charette, Luke Currin, David Davey, Jean Demers, Steve Dumont, Marcel Gahbauer, Shannon Gailbraith, Nicole Guido, Alison Hackney, Lisa Keelty, Marcel Lebeau, Barbara MacDuff, Asya Malinova, Francine Marcoux, Betsy McFarlane, Phillip Mercier, Emma Nip, Catherine Russell, Clémence Soulard, Patricia Stotland, Natalie Thimot, Elise Titman, Rodger Titman, Christiane Tremblay, François Villeneuve.

Notes:  Week 9 at MBO this year was most unusual. Although a few of the trees on the forested slopes overlooking MBO are finally showing patches of yellow, the limited advance of fall colours is even more conspicuous than last week. Meanwhile, it almost seems as if the birds are waiting for that change to progress, as the count of birds banded this week (174) was a record low for the period, and by a long shot at that (the previous low was 263 in 2015, while the record high was 1112 in 2008 and the mean over the past decade was 530); windy conditions for much of the week no doubt had some effect on driving the capture rate to its lowest level ever for week 9. The 77 species observed this week is lower than has been the norm for week 9 over the past four years, but close to the long-term mean at this point in fall..

With near-record numbers of Swainson’s Thrushes migrating through MBO this fall, we are curious to see whether Hermit Thrushes will show a similar spike, now that their migration period is beginning (Photo by Simon Duval)

With near-record numbers of Swainson’s Thrushes migrating through MBO this fall, we are curious to see whether Hermit Thrushes will show a similar spike, now that their migration period is beginning (Photo by Simon Duval)

Three species banded this week were new for fall 2015 – Winter Wren, Hermit Thrush, and Orange-crowned Warbler; the wren and warbler were both new for the entire year in fact. As well, four species were observed for the first time this season – Cackling Goose, Hermit Thrush, Orange-crowned Warbler, and Fox Sparrow; only the goose was new for the year.

This week’s top 10 [last week’s rank in brackets]

# individuals bandedmean # individuals observed daily
 1.  White-throated Sparrow (51) [3] 1.  Canada Goose (319) [1]
 2. Blue Jay (16) [8] 2. Blue Jay (65) [2]
 3. Ruby-crowned Kinglet (14) [10] 3. American Crow (47) [3]
 4. Slate-colored Junco (13) [-] 4. White-throated Sparrow (46) [4]
 5. Yellow-rumped Warbler (10) [-] 5. American Robin (33) [5]
 6. Swainson’s Thrush (9) [1] 6. European Starling (22) [8]
 7. Gray Catbird (8) [6] 7. Black-capped Chickadee (20) [6]
 8. Golden-crowned Kinglet (7) [4] 8. Red-winged Blackbird (19) [10]
 9. Song Sparrow (5) [7] 9. Yellow-rumped Warbler (17) [7]
 10. Black-throated Blue Warbler (4) [-]
10. Indigo Bunting (4) [-]
 9. American Goldfinch (17) [-]

More than three times as many White-throated Sparrows were banded this week than any other species, and this marked the seventh time in 11 years that the species was the most banded in week 9. However, reflecting the overall low numbers this week, the 51 White-throated Sparrows banded is just barely ahead of the record low for week 9 (49 individuals in 2011). Conversely, the 16 Blue Jays banded was behind only last year’s record high count of 23 in week 9. The most notable result this week was the low number of Ruby-crowned Kinglets – fewer than one-third as many as the previous record of 45 set in 2007 and matched in 2009 and 2014. Similarly, the 10 Yellow-rumped Warblers banded this week was a record low for week 9. However, Slate-colored Juncos are appearing on schedule in typical numbers, and although the Swainson’s Thrush migration is finally nearing its end, the number banded this week remained well above average. Among the rest of the top ten, the most interesting results were the two “blue birds” tied for tenth place – Black-throated Blue Warbler and Indigo Bunting.

In a rare event, the top five species observed this week were all the same as last week, although for each of them the mean daily count increased compared to week 8. As in every previous year, Canada Goose was the most numerous species during week 9. The count of Blue Jays was well above average, matching the number observed in 2012, but below the high mean daily count of 94 in 2010. Our observations are consistent with reports of large counts of Blue Jays migrating through southern Ontario – more than 10,000 per day in some locations along Lake Erie! Most notable among the other species was Yellow-rumped Warbler, which remained among the top ten species observed this week even though relatively few were banded, reflecting that persistent winds through much of the week likely affected banding rates.

Last but not least, this week marked the start of our six-week owl banding season, with effort scheduled nightly (weather permitting). As expected, the early results were modest, with 5 Northern Saw-whet Owls banded, plus a recapture of an individual banded in South Hadley, Massachusetts in fall 2013, and now three years old.

The number of Indigo Buntings observed and banded this week was above average, and included this nicely marked after-hatch-year male (Photo by Simon Duval)

The number of Indigo Buntings observed and banded this week was above average, and included this nicely marked after-hatch-year male (Photo by Simon Duval)

Tyran tritri

Ca s’améliore à chaque jour à l’OOM, plusieurs nouvelles espèces encore ce matin. Le Tyran tritri est de retour depuis quelques jours. Ce n’est pas une espèce que nous baguons souvent, seulement 25 individus en 10 ans. Nous étions donc heureux de faire la recapture de cette femelle baguée en mai 2014!!!

6may

Journée tranquille

Les deux derniers jours ont été tranquilles, très tranquilles! Cette femelle Épervier brun âgée de plus de trois ans est venue mettre un peu de soleil dans une journée tranquille! Ai-je dis tranquille?

mayday2015

Vieux ami

Ce mâle Cardinal rouge a été bagué en septembre 2011 à l’OOM et recapturé plusieurs fois depuis, sa dernière visite étant mardi. Il est maintenant âgé d’au moins 5 ans!!

noca

Grimpereau brun

Journée de pluie à l’OOM, pas de baguage mais beaucoup de juncos et Bruants fauve étaient présents sur le site. Pour patienter jusqu’à demain, voici une photo du premier Grimpereau brun de la saison, bagué hier matin!!!

 

20150421

Nouvelle saison

L’OOM entame sa 11ième année d’opération!! Aujourd’hui marquait le début de la saison de baguage dans le cadre de notre suivi de la migration printanière. Bien que ce soit les juncos qui ont dominé avec 9 individus bagués sur un total de 20, le premier oiseau de la saison fût ce joli Bruant fauve!

mbo18apr

Encore des oiseaux

Une bonne augmentation du nombre de Bruants à gorge blanche ce matin, mais nous sommes toujours à la recherche de la première paruline. En attendant, les Canards branchus sont en pleine saison de reproduction.

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Beaucoup des Jaseurs d’Amérique

La journée de vendredi fût non seulement spéciale car nous avons bagué la première Crécerelle de l’OOM, mais aussi car nous avons bagué 146 oiseaux, un record pour une journée de printemps.

De ce nombre, 134 étaient des Jaseurs d’Amérique. Pour mettre ce nombre en perspective, le nombre record de jaseurs bagués pour un printemps complet était de 77

Cedar Waxwing - Jaseur d'Amérique

Cedar Waxwing – Jaseur d’Amérique

Printemps 2014

Bonjour à tous,

Nous avons eu un bel hiver à l’Observatoire d’Oiseaux de McGill. Des centaines d’oiseaux se sont nourris aux mangeoires tout l’hiver dont pour la toute première fois, une Mésange bicolore. Merci à Protection des Oiseaux du Québec pour le don de graines pour les mangeoires.

Malgré la récente chute de neige, le printemps approche à l’OOM ! Le Suivi de la Migration du Printemps débute le 28 mars, avec les recensements. Le baguage pour sa part débute le 18 avril et se poursuit jusqu’au 1er juin. L’horaire est maintenant en ligne sur le site WhenToHelp, réservez vos places rapidement !

Nous sommes présentement en train de mettre à jour notre site internet. Nous sommes à la recherche de bénévoles pour nous aider à la traduction du site de l’anglais au français. Si vous voulez nous aider, envoyez-nous un courriel à mbo@migrationresearch.org

Bonnes observations,

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