Redhead

Scientific Name: Aythya americana

Wikipedia Page

Avibase

Dendroica

Cornell Lab of Ornithology

Thresholds:

Global5,900
Regional/Continental5,900

Global

1% of the global population estimate. This threshold is used to identify trigger species and IBAs under categories A4i/ii and A4iv.

Regional/Continental

1% of the regional/continental population estimate.

Long Point Peninsula and Marshes (ON001)
Number Year Season
14,762 - 166,7002021Fall
5,000 - 11,0002020Winter
11,910 - 20,0002020Fall
5,000 - 6,5002020Spring
5,0002019Winter
8,000 - 13,0302019Fall
10,0002019Spring
17,840 - 22,0002018Fall
5,000 - 10,5002018Spring
5,0002018Winter
5,000 - 30,8002017Fall
7,5002017Spring
5,000 - 12,0002017Winter
5,0002016Winter
7,500 - 76,0302016Fall
5,000 - 25,8252015Winter
36,700 - 49,0002015Fall
5,000 - 26,0812014Winter
25,115 - 46,2002014Fall
7,0002014Spring
33,500 - 35,0002013Fall
5,000 - 12,0002013Spring
7,547 - 12,0002012Winter
10,500 - 44,2302012Fall
9,5002012Spring
6,0042011Winter
20,0002011Spring
10,000 - 15,0002009Fall
10,4002008Spring
5,3002006Fall
7,0132001Winter
6,4142000Winter
16,2281999Winter
9,573 - 13,5781998Fall
13,464 - 18,9311998Spring
21,8971998Winter
10,0891992Fall
Long Island and Long Island Bay (MB085)
Number Year Season
60,0001977Fall
Cumberland Marshes (SK102)
Number Year Season
36,0001972Summer
Wolfe Island (ON037)
Number Year Season
7,000 - 7,3002020Fall
4,7042019Fall
8,1002018Fall
5,100 - 15,0502017Fall
4,7562017Spring
7,0002017Winter
4,5002016Fall
8,000 - 14,4702015Fall
9,0002011Fall
5,986 - 7,0002010Winter
8,0002010Fall
12,000 - 16,0002009Fall
5,0442006Winter
3,7001993Fall
Eastern Lake St. Clair (ON012)
Number Year Season
5,0002016Spring
12,0022016Winter
15,2002007Winter
Norfolk Forest Complex (ON009)
Number Year Season
14,0002000Fall
Prince Edward County South Shore (ON003)
Number Year Season
4,5002021Winter
10,0002020Winter
4,500 - 5,0002017Winter
8,0002016Winter
5,0002012Winter
Creston Valley (BC179)
Number Year Season
5,0002021Spring
5,0002019Spring
5,0002017Winter
4,5012015Spring
5,0002015Winter
9,3901990Fall
6,3141989Fall
6,5801988Summer
7,9301986Fall
9,2001984Fall
Greater Rondeau Area (ON007)
Number Year Season
7,5002019Spring
7,500 - 9,3002001Winter
Lower Detroit River (ON047)
Number Year Season
9,0111997Winter
3,0121996Winter
1,0051993Winter
Presqu'ile Provincial Park (ON004)
Number Year Season
5,500 - 7,0002021Spring
7,2002019Fall
5,0002019Spring
5,5002017Winter
8,0002016Spring
5,5001998Spring
Amherst Island (ON062)
Number Year Season
7,5002016Winter
Luck Lake (SK003)
Number Year Season
5,0002016Fall

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