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: Northern Rockies

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
19700.1180.0480.268
19710.1160.0440.256
19720.1190.0470.262
19730.1050.0390.2
19740.1050.0380.198
19750.1210.0560.232
19760.1070.0370.198
19770.1170.0530.222
19780.1210.0630.223
19790.1250.060.243
19800.1260.0690.243
19810.1410.0780.311
19820.1210.0620.213
19830.1290.0670.245
19840.1380.0780.283
19850.1410.0870.3
19860.1220.0610.208
19870.1250.0630.229
19880.1360.0750.29
19890.1110.0450.183
19900.1350.0770.259
19910.1390.0630.281
19920.1560.0860.313
19930.1670.1040.438
19940.1560.0940.358
19950.1450.0890.313
19960.1150.0530.197
19970.1430.0860.294
19980.1340.0750.235
19990.1260.060.218
20000.1530.0910.337
20010.1450.0840.303
20020.1260.060.223
20030.1370.0720.268
20040.1290.0620.242
20050.1420.0780.297
20060.1350.070.253
20070.170.0970.414
20080.1560.0860.34
20090.1280.0560.245
20100.1150.0420.219
20110.1770.0920.495
20120.1450.0740.307
20130.1180.0450.238
20140.1280.0520.261
20150.1130.0360.227
20160.1570.0740.348

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