Graph

Common Nighthawk
(Chordeiles minor)

Breeding Bird Survey (BBS) - Canadian analysis

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

Geographic area or population: Canada

Graph showing the trend of the species through out the observed years
 
Listing of the threshold values that appear on the graph
Population below lowest acceptable levelGoal
0.383 0.511
Listing of the individual data points that make up the graph
YearAnnual IndexLower limitUpper limit
19700.5280.3880.758
19710.5340.3970.786
19720.5080.3840.712
19730.50.380.714
19740.4930.3760.684
19750.4360.340.589
19760.4440.3450.604
19770.4420.3450.591
19780.440.3410.615
19790.3940.3060.524
19800.4120.3230.559
19810.3740.2990.48
19820.3720.3030.491
19830.3580.2860.466
19840.3490.2770.462
19850.340.2730.451
19860.3230.260.422
19870.3110.2470.403
19880.3130.2520.413
19890.2950.240.373
19900.2850.2290.352
19910.2950.2390.375
19920.3060.2460.413
19930.2730.2230.356
19940.250.20.324
19950.2590.2130.336
19960.2370.190.298
19970.2350.1910.293
19980.250.2060.33
19990.2340.1880.303
20000.2210.1790.278
20010.2070.1650.26
20020.2070.1650.278
20030.2130.1720.274
20040.1950.1560.246
20050.2030.1630.265
20060.190.150.245
20070.1830.1450.235
20080.1880.1480.258
20090.1840.1480.251
20100.1790.1420.241
20110.1640.1250.217
20120.1760.1370.238
20130.1770.1370.239
20140.1630.1250.215
20150.1810.1430.241
20160.1710.1330.229

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