McGILL BIRD OBSERVATORY

WINTER POPULATION MONITORING

February 2011

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 MONTH:



Although weather was again a strong limiting factor in February, we managed
to band a few wintering birds, including this Common Redpoll.
(
Photo by Simon Duval)


MBO gratefully acknowledges the in-kind support provided for winter 2010-2011 by CCFA (Centre de Conservation de la Faune Ailée) in Montreal, in the form of bird seed to keep the MBO feeders stocked throughout the season.

 

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THIS PERIOD

THIS WINTER

2011 TOTAL

SITE TOTAL

# birds (and species) banded

4 (2)

382 (18)

4 (2)

31573 (106)

# birds (and species) repeat

--

68 (8)

--

5507 (68)

# birds (and species) return

3 (1)

14 (4)

3 (1)

810 (37)

# species observed

27

49

27

202

# net hours

1.0

110.0

1.0

49618.1

# birds banded / 100 net hours

400.0

347.3

400.0

63.6

Note: table does not include nocturnal banding (owls)

Banders-in-charge:  Simon Duval, Gay Gruner
Observers:
  Barbara MacDuff, Chris Murphy, Greg Rand

Notes:  The weather remained cold for most of February, and there was also a fair bit more snow added to the already above-average amount that has fallen this winter.  However, we made 6 visits to MBO over the course of the month, and on one of those occasions conditions were pleasant enough to allow us to briefly open the nets for the first time this year. That we banded a couple of Common Redpolls was no surprise, as large flocks have dominated the bird life at MBO this month, but it is surprising that we keep catching "new" Black-capped Chickadees, considering how many local birds we have already banded earlier this winter or in previous years.  In addition to the four new birds, we recaptured three previously banded birds for the first time this winter.

This month ’s top 5   [last month's rank in brackets]

# individuals banded

mean # individuals observed daily

1.  Black-capped Chickadee (2) [-]

1.  Common Redpoll (60) [-]

1.  Common Redpoll (2) [-]

2.  European Starling (31) [5]

 

3.  American Crow (21) [-]

 

4.  Black-capped Chickadee (16) [1]

 

4.  Bohemian Waxwing (12) [4]

As noted above, Common Redpolls were present in large numbers throughout the month, following up on the arrival of a smaller flock we noted at the end of January.  Three other species were observed on all visits this month, all of them also frequenting the feeders:  Black-capped Chickadee, Northern Cardinal, and Slate-colored Junco.  Of these, only the chickadee was abundant enough to crack the top five for the month, along with starlings and Bohemian Waxwings still feeding on last fall's buckthorn berries and other fruit, and part of the local crow flock.

Among the redpoll flocks was at least one Hoary Redpoll, the first observed at MBO since March 2006.  Four other species were observed for the first time this winter, with the least surprising of them being Ruffed Grouse, although it is far from common at MBO.  Great Horned Owl and Eastern Screech-Owl are both local residents, but Greg's sightings this month were our first ever winter records - probably attributable to us rarely being around close to dusk or dawn (let alone at night) at this time of year.  The crows helped out a bit by mobbing the two Great Horned Owls, while the Screech-Owl required some sharper spotting, as it perched along the census trail by the back ponds.  Arguably the biggest surprise though is that this month we saw our first House Sparrow of winter ... and in fact, it was our first sighting of this formerly regular species since last winter!


One of our banded resident chickadees hanging out near the feeders.

(Photo by Simon Duval)


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2002- The Migration Research Foundation Inc.