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 Softwood Shield

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
19700.2150.1240.382
19710.2140.1240.379
19720.210.1210.364
19730.2080.1210.347
19740.2070.1230.355
19750.2120.1310.351
19760.220.1360.373
19770.2090.130.345
19780.2030.1230.322
19790.2070.1310.328
19800.2140.1370.346
19810.2110.1370.33
19820.2050.1340.317
19830.2090.1350.333
19840.2160.1430.343
19850.2120.1420.332
19860.210.1390.318
19870.2130.1440.33
19880.2140.1440.326
19890.2140.1430.321
19900.2070.1350.297
19910.2220.1550.356
19920.2180.150.334
19930.2180.150.317
19940.2170.1550.335
19950.2130.1470.304
19960.2120.1440.301
19970.2150.1510.309
19980.2130.1420.302
19990.2180.1490.311
20000.2170.1450.308
20010.2320.1670.375
20020.2280.1580.37
20030.2210.1480.333
20040.2290.150.355
20050.2270.1530.34
20060.2280.1540.357
20070.2340.1560.358
20080.2290.1530.341
20090.2450.1650.415
20100.2340.1520.362
20110.2490.1640.39
20120.230.1430.361
20130.2420.1580.387
20140.2570.1680.462
20150.2350.1460.39
20160.2590.1630.463

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