Graph

Common Tern
(Sterna hirundo)

Breeding Bird Survey (BBS) - Canadian analysis

Additional information on: Breeding Bird Survey (BBS) - Canadian analysis

Geographic area or population: Lower Great Lakes / St. Lawrence Plain

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
19700.4540.2221.03
19710.4550.2311.08
19720.4690.241.14
19730.4170.2150.938
19740.4070.210.875
19750.4120.2170.899
19760.420.231.02
19770.3870.2140.837
19780.3730.1980.805
19790.3510.1780.728
19800.3670.1990.791
19810.370.210.812
19820.3490.1950.751
19830.3510.1950.759
19840.3320.1760.727
19850.340.1910.766
19860.3420.1950.77
19870.3080.1720.64
19880.310.1790.655
19890.2890.1560.602
19900.3020.1740.669
19910.3010.1740.676
19920.2680.1440.58
19930.2830.1580.63
19940.2860.1650.661
19950.2740.1550.624
19960.250.1350.546
19970.2450.1310.539
19980.2770.1510.727
19990.2540.140.597
20000.2430.1230.574
20010.2420.130.579
20020.2540.1380.646
20030.2340.1230.579
20040.2320.1190.592
20050.2240.1170.579
20060.2330.1230.62
20070.2120.10.534
20080.2350.1140.656
20090.220.1080.607
20100.1960.0940.511
20110.2030.0960.546
20120.1970.0910.54
20130.1950.090.553
20140.1930.0880.576
20150.1850.0820.551
20160.1830.0780.542

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