Graph

Common Tern
(Sterna hirundo)

Breeding Bird Survey (BBS) - Canadian analysis

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

Geographic area or population: Boreal Taiga Plains

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
19700.6340.2312.36
19710.5790.2171.86
19720.5970.2421.8
19730.6010.2412.04
19740.5530.2091.86
19750.5020.21.45
19760.5450.2271.66
19770.4850.1971.42
19780.4560.1861.29
19790.4920.2141.55
19800.4160.1771.08
19810.4530.2041.25
19820.4320.1971.15
19830.4070.1791.08
19840.3790.1651.04
19850.4350.1991.41
19860.4160.1911.25
19870.3630.1730.916
19880.3470.1640.923
19890.3430.1630.951
19900.3620.1850.881
19910.4250.211.9
19920.3180.160.775
19930.2950.1420.73
19940.3060.1650.733
19950.2670.1290.568
19960.3250.1720.926
19970.2510.1270.554
19980.2750.1440.654
19990.330.1711.12
20000.2430.1280.572
20010.250.130.575
20020.2470.1330.559
20030.240.1250.581
20040.2490.1310.637
20050.2070.1040.441
20060.2170.1050.606
20070.210.1090.472
20080.2140.1090.499
20090.2130.1080.52
20100.2040.1030.49
20110.2250.1150.63
20120.2080.1010.541
20130.1690.0760.39
20140.1740.0770.435
20150.210.1020.636
20160.1520.0660.37

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