Loggerhead Shrike Presentation by Andy Didiuk - Saskatchewan ...

Prairie Loggerhead Shrikes
Andrew Didiuk
Canadian Wildlife Service, Saskatoon
of Prairie Canada

Range
southeastern Alberta
southern Saskatchewan
extreme southwestern Manitoba
range contraction southward

Status
COSEWIC Committee on the Status of Wildlife in Canada
Threatened 1986
National Recovery Plan 1994, 2012
Manitoba endangered
Saskatchewan not listed
Alberta not listed

Small mammals
Small birds
Amphibians and snakes
Insects of all kinds

Arrival

Nesting

Nestlings

Fledging

Disperal & Departure

Percent of Total Nest Observations
20
15
10
5
0
-5
1 - 5 6 - 25 26 -
50
51 -
75
76 -
100
101 -
125
126 -
150
Percent of 1st Observation - Nest Distance
2009 & 2010 Combined Middle Sandhills Shrike Surveys
151 -
175
176 -
200
201 -
225
226 -
250
251 -
275
276 -
300
301 -
325
326 -
350
Distance Range (m)
351 -
375
376 -
400
401 -
425
426 -
450
451 -
475
~ 400 meters
linear and logarithmic
trend lines
n = 126
476 -
500
501 -
525
526 -
550
551 -
575
576 -
600

Grassland Habitat

Val Marie PFRA Pasture

Farmland Habitat

Hanley, SK study area

Population Trends
BBS routes

2008

2008
N W N E
S W S E

N W

S W

N E

S E

# Nesting Pairs
350
300
250
200
150
100
50
0
1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000
Study Year
SW Manitoba

Finding the Wintering Areas
Genetics Stable Isotopes

Genetics
Hydrogen
Isotope
Genetics
Carbon Isotope

Stewardship
in Farmlands

Shrubs
for
Shrikes

Stewardship
in Grasslands