Graph

Redhead
(Aythya americana)

Waterfowl Breeding Population and Habitat Survey in Western Canada and the Northwestern United-States

Additional information on: Waterfowl Breeding Population and Habitat Survey in Western Canada and the Northwestern United-States

Geographic area or population: Western Boreal Forest

Graph showing the trend of the species through out the observed years
 
Listing of the individual data points that make up the graph
YearEstimated Population95% Lower confidence interval95% Upper confidence interval
1955127752.3367039.66188465
195682823.3233283.75132362.89
195755773.1221280.4890265.76
195829463.12061074.48
1959133770.4277669.89189870.94
1960100597.6855879.34145316.03
1961109385.4960849.51157921.47
1962120310.168954.28171665.92
196343647.110078.6177215.59
1964123783.5163928.39183638.62
196565855.8413080.04118631.64
196650748.8416735.5984762.09
1967101492.3163421.96139562.67
1968113140.9152650.04173631.77
196949937.1918709.1181165.27
197077418.120163091.1
197143893.4718159.0169627.92
197239153.3825905.6552401.11
197346282.4725162.0967402.86
197414512.03029224.68
197534656.589469.6259843.55
197627177.716066.4248289
197763647.5538737.3688557.74
197848404.921306.8975502.91
197938239.3916907.3859571.4
198069323.6943081.5695565.81
1981104805.9559604.91150006.99
198242955.1219973.3765936.86
198344945.6714997.3574893.98
198453379.282693.19104065.36
198526962.229628.6544295.79
198648448.729699.1467198.26
198723096.3713778.0832414.65
198839553.0722191.3556914.79
198951423.5918663.3184183.87
199064163.9142682.9685644.87
199182871.9557835.55107908.34
199296521.4222400.29170642.55
199381000.9425565.25136436.63
199469414.442962.5195866.28
199533188.5919169.8347207.34
199630856.9115713.2946000.52
199772495.2435297.38109693.1
199898756.0751880.64145631.5
1999124862.6478110.58171614.69
200066410.4530166.78102654.11
200134405.3419906.648904.08
200267525.2747024.0288026.51
200355656.2227250.9784061.48
2004105388.6368708.68142068.57
200562953.0926993.3298912.87
200664213.2736408.392018.25
200790569.6356403.88124735.38
2008106179.9134827.92177531.89
20093473118980.650481.4
20105485723579.0986134.91
20113145116957.5145944.49
20123569322258.9749127.03
20132775313950.8941555.11
20146082235704.9385939.07
20156714935550.7898747.22
201698616.1355937.81141294.45
201758176.3738797.2277555.52

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