Graph

Northern Harrier
(Circus hudsonius)

Breeding Bird Survey (BBS) - Canadian analysis

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

Geographic area or population: Canada

Graph showing the trend of the species through out the observed years
 
Listing of the threshold values that appear on the graph
Population below lowest acceptable level
0.445  
Listing of the individual data points that make up the graph
YearAnnual IndexLower limitUpper limit
19700.4650.3890.576
19710.4530.3810.556
19720.4460.3810.54
19730.4320.3710.509
19740.4310.3660.52
19750.4030.3450.478
19760.4210.3610.513
19770.4050.3460.48
19780.4110.3470.504
19790.390.3360.461
19800.3760.3280.442
19810.3880.3330.465
19820.3610.3110.425
19830.4060.3460.496
19840.3330.2810.397
19850.3380.2940.397
19860.3430.2960.407
19870.3350.2940.394
19880.3360.2910.396
19890.310.2720.361
19900.3110.2740.36
19910.2980.2580.345
19920.3160.2780.369
19930.3070.2740.357
19940.3120.2740.359
19950.2910.2550.335
19960.2850.250.33
19970.2890.2560.342
19980.2710.2380.315
19990.2660.2350.301
20000.2750.2450.313
20010.2630.2320.311
20020.2340.2010.274
20030.2410.2110.276
20040.2490.2160.3
20050.2530.2240.295
20060.2680.2310.347
20070.2470.2120.288
20080.2460.2140.293
20090.2450.2150.289
20100.2230.1940.26
20110.2480.2170.29
20120.2170.1880.251
20130.2230.1930.26
20140.2120.1850.247
20150.2030.1750.235
20160.2450.2110.297

Notes on numeric data: Ex represents 10 to the power of x; For example 1.2345E-2 is equivalent to 0.012345