Population status

Black-billed Magpie
(Pica hudsonia)

The Black-billed Magpie is well monitored by the Breeding Bird Survey (BBS), with good coverage of the species’ breeding population. BBS results indicate a fluctuating but overall unchanged population relative to about 1970.

Breeding Bird Survey (BBS) - Canadian analysis

Additional information on: Breeding Bird Survey (BBS) - Canadian analysis

View definitions of table column headings being used by: Breeding Bird Survey (BBS) - Canadian analysis

Table 1: Population trends by geographic area
Geographic area	Time Period ^{Table 1 - footnote 1}	Annual trend ^{Table 1 - footnote 2}	Intervals ^{Table 1 - footnote3}
Geographic area	Time Period ^{Table 1 - footnote 1}	Annual trend ^{Table 1 - footnote 2}	Lower	Upper
Canada Select to view graph of the geographic area: Canada 1970-2012; Breeding Bird Survey (BBS) - Canadian analysis	1970-2012	-0.2	-0.6	0.3
Canada Select to view graph of the geographic area: Canada 2002-2012; Breeding Bird Survey (BBS) - Canadian analysis	2002-2012	0	-1	1

References

Trost, C.H. 1999. Black-billed Magpie (Pica hudsonia), The Birds of North America Online (A. Poole, Ed.). Cornell Lab of Ornithology, Ithaca, New York. Trost, C.H. 1999. Black-billed Magpie (Pica hudsonia), The Birds of North America Online (A. Poole, Ed.). Cornell Lab of Ornithology, Ithaca, New York. (Link)