Graph

Great Blue Heron
(Ardea herodias)

Breeding Bird Survey (BBS) - Canadian analysis

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

Geographic area or population: Prairie Potholes

Graph showing the trend of the species through out the observed years
 
Listing of the individual data points that make up the graph
YearAnnual IndexLower limitUpper limit
19700.4140.2680.74
19710.420.2710.757
19720.3540.2270.564
19730.3460.2190.548
19740.340.2160.517
19750.3520.2240.559
19760.3460.2180.521
19770.330.2070.495
19780.3210.1980.484
19790.3160.1940.46
19800.3150.2020.456
19810.3080.1890.437
19820.3310.2210.497
19830.3140.2090.453
19840.2970.1890.42
19850.2920.1820.409
19860.2920.1860.41
19870.2920.1890.405
19880.2990.2050.415
19890.3270.2490.494
19900.3190.2380.462
19910.3180.2420.479
19920.2950.2090.389
19930.2980.2190.405
19940.3020.2180.396
19950.2820.1960.366
19960.3130.2420.457
19970.2840.2140.385
19980.290.2070.382
19990.2940.220.398
20000.3140.2450.428
20010.2830.2090.373
20020.2990.2250.4
20030.2890.220.405
20040.2730.1960.359
20050.3080.2350.406
20060.2720.1940.349
20070.2730.2040.358
20080.2920.2230.401
20090.2740.2030.373
20100.2850.2140.377
20110.2840.2080.395
20120.3110.2370.436
20130.2930.2160.396
20140.3220.2440.435
20150.3390.2550.471
20160.2960.2240.405

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