Graph

American Bittern
(Botaurus lentiginosus)

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
19700.2120.0710.543
19710.2180.0880.55
19720.1980.0670.497
19730.1750.0490.403
19740.1920.0840.459
19750.1770.0830.389
19760.1580.0630.341
19770.1490.0560.305
19780.1490.0660.332
19790.1690.0880.452
19800.1460.0730.324
19810.1430.0730.374
19820.1170.0430.235
19830.1180.0540.255
19840.1070.0420.215
19850.1040.0390.211
19860.0980.0370.201
19870.0920.0340.182
19880.0860.030.171
19890.0810.0270.157
19900.0860.0410.194
19910.0910.0520.265
19920.0680.0230.126
19930.0670.0270.132
19940.0730.0390.18
19950.0680.0370.153
19960.0740.0430.224
19970.0540.0210.108
19980.0570.0290.127
19990.0480.0190.09
20000.0430.0120.082
20010.0450.0170.09
20020.0450.0220.093
20030.0410.0130.083
20040.040.0170.082
20050.0350.010.074
20060.0340.0130.074
20070.0340.0140.073
20080.0310.010.067
20090.030.010.065
20100.0320.0140.086
20110.0270.0090.066
20120.030.0130.092
20130.0250.0080.067
20140.0240.0080.064
20150.0270.0110.09
20160.0220.0070.06

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