McGILL BIRD OBSERVATORY

SPRING MIGRATION MONITORING PROGRAM

Week 2:  April 4 - 10, 2013

Welcome to the McGill Bird Observatory weekly report.  Click here for a complete listing of our archives.
Comments or questions are welcome at "mbo AT migrationresearch.org".

PICTURE OF THE WEEK:


Turkey Vulture
We have had a resident pair of Turkey Vultures at MBO the past few years - this
may be one of them, back for another summer.
(Photo by Gay Gruner)

 

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THIS WEEK

THIS SPRING

2013 TOTAL

SITE TOTAL

# birds (and species) banded

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368 (13)

41880 (111)

# birds (and species) repeat

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71 (7)

8052 (70)

# birds (and species) return

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32 (11)

1241 (38)

# species observed

42

47

56

207

# net hours

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55.0

69344.7

# birds banded / 100 net hours

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669.1

60.4

Note: table does not include nocturnal banding (owls)

Banders-in-charge:  Simon Duval, Gay Gruner
Censusers: 
Nicolas Bernier, Jean Demers, James Junda, Lisa Keelty, Barbara MacDuff, Don MacDuff, Betsy McFarlane, Clémence Soulard, Elise Titman, Rodger Titman

Notes:  As usual, the second week of spring migration brought an influx of additional migrants returning to (or passing through) MBO.  With last year's early spring, Wood Ducks were already back before the end of the official winter season, but this year the first sighting was on April 5.  This week's 11 other new arrivals were American Black Duck, Hooded Merganser, Great Blue Heron, Cooper's Hawk, Merlin, Belted Kingfisher, Tree Swallow, Red-breasted Nuthatch, Golden-crowned Kinglet, Song Sparrow, and Eastern Meadowlark  - the latter quite a rare treat at MBO, with only a few previous observations, all also in spring.

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

# individuals banded

mean # individuals observed daily

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1.  Canada Goose (236)  [1]

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2.  Greater Snow Goose (84)  [6]

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3.  Red-winged Blackbird (58)  [2]

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4.  Ring-billed Gull (14)  [5]

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5.  European Starling (14)  [9]

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5.  Black-capped Chickadee (14)  [4]

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7.  Mallard (11)  [-]

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8.  Slate-colored Junco (9)  [-]

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9.  American Tree Sparrow (9)  [-]

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9.  American Robin (8)  [-]

Over the 9 years of spring migration monitoring at MBO, Canada Goose has always been the most abundant species in week 2, although the mean daily count has varied from as low as 60 (in 2010) to as high as 732 (in 2006).  This year seems fairly average, with a mean count of 236.  Snow Geese were particularly numerous this week, ranking in second place in week 2 for the third time in nine years, but with a higher count than ever before.  In five of the other years it was Red-winged Blackbird taking second place.  This year the species got bumped down to third place, despite the mean daily count of 58 individuals being the highest ever for the species this early in spring.  The remainder of the species in this week's top ten were all significantly less abundant than the top three.  Slate-colored Junco and American Tree Sparrow were new additions this week, although good numbers overwintered at MBO, and many of these individuals may still be the same.

Snowy morning
Although it is "spring", the morning of April 5 looked decidedly more like winter!
(Photo by Simon Duval)

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