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: Boreal Taiga Plains

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
19700.2430.1460.44
19710.2560.1560.457
19720.2390.1440.406
19730.2340.1420.378
19740.2690.1730.55
19750.2530.1560.433
19760.2580.1650.428
19770.290.1880.51
19780.250.1630.382
19790.2840.1930.45
19800.2650.1810.409
19810.2610.1760.395
19820.2670.1850.411
19830.2840.1920.461
19840.2830.1930.471
19850.2510.170.372
19860.2660.1810.41
19870.3050.2140.528
19880.2620.1760.395
19890.2850.2060.428
19900.2830.2070.464
19910.2830.2040.422
19920.2690.1930.38
19930.2960.2170.441
19940.3210.240.501
19950.2490.1710.344
19960.2510.180.355
19970.2680.1960.357
19980.3080.2290.432
19990.2960.2220.424
20000.2930.2230.403
20010.3380.2510.502
20020.2690.1990.368
20030.2830.210.381
20040.3090.2210.499
20050.3260.2470.483
20060.3250.240.505
20070.2830.2050.388
20080.2920.2150.395
20090.3320.2440.512
20100.2730.190.376
20110.2980.2130.425
20120.3330.2310.627
20130.2950.2040.427
20140.2980.2110.432
20150.3340.2340.568
20160.3390.2480.506

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