Graph

Common Tern
(Sterna hirundo)

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
19700.6220.3361.17
19710.6510.3711.3
19720.7080.411.99
19730.570.3221.05
19740.550.3281.03
19750.50.2730.9
19760.4760.2240.85
19770.4930.2850.941
19780.4520.2480.85
19790.4810.2911.06
19800.430.2590.787
19810.4460.2791.09
19820.3990.2390.783
19830.3640.2130.69
19840.3330.170.57
19850.3370.2010.614
19860.3360.2040.658
19870.3120.1840.568
19880.3260.2040.721
19890.3040.1930.585
19900.2880.1810.575
19910.2690.1620.487
19920.2850.1770.565
19930.2610.1590.491
19940.2360.140.458
19950.2280.1370.484
19960.2140.1210.398
19970.1990.1080.381
19980.1910.1110.393
19990.1850.0990.351
20000.1890.1040.371
20010.1660.0880.319
20020.1620.0860.313
20030.1490.0770.289
20040.1450.0760.288
20050.1380.0690.275
20060.1310.0670.259
20070.1260.0630.259
20080.1260.0660.271
20090.1210.0610.255
20100.1110.0550.237
20110.1060.0510.246
20120.1070.0550.24
20130.0970.0460.225
20140.0970.0470.224
20150.1030.0520.272
20160.10.0490.271

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