Graph

White-headed Woodpecker
(Dryobates albolarvatus)

Breeding Bird Survey (BBS) - Canadian analysis

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

Geographic area or population: North America

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
19700.2560.1990.337
19710.2590.2010.343
19720.2580.2050.34
19730.2630.210.34
19740.250.1950.322
19750.2710.2110.366
19760.2810.2240.372
19770.2730.2190.343
19780.2610.2090.327
19790.2630.2110.329
19800.2610.2090.323
19810.2830.2350.357
19820.280.2310.358
19830.2720.2220.341
19840.3030.2420.407
19850.2790.2320.343
19860.2820.2330.347
19870.3020.2520.375
19880.280.230.336
19890.2920.2460.355
19900.3040.2540.376
19910.2980.2460.358
19920.3210.2680.397
19930.3130.2660.383
19940.3050.2580.368
19950.3070.2590.368
19960.3080.2580.373
19970.3240.2650.403
19980.3050.250.365
19990.3170.2660.38
20000.3330.2720.408
20010.3380.2870.417
20020.3360.2820.407
20030.3260.2720.395
20040.3510.2950.43
20050.3510.2950.427
20060.3610.2940.449
20070.3490.2880.427
20080.3540.2960.437
20090.3920.3220.489
20100.3790.3120.473
20110.3640.2980.456
20120.3630.2970.455
20130.3690.2990.463
20140.4360.3510.569
20150.3870.3110.492
20160.380.3020.485

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