200,0000
0
51960 1970 1980 1990 2000 2010100,000
0
0
51960 1970 1980 1990 2000 2010100,000
0
0
5
10
151960 1970 1980 1990 2000 2010100,000
0
0
5
10
151960 1970 1980 1990 2000 2010600,000400,000200,0000
0
5
10
151960 1970 1980 1990 2000 2010200,0000
0
5
101960 1970 1980 1990 2000 2010Gulls, Terns, Albatrosses and Other SeabirdsGeeseTotal Bandings: 37,568,192
Total Encounters: 200,206Total Bandings: 462,501
Total Encounters: 8,268Total Bandings: 280,816
Total Encounters: 5 ,1 2 0Total Bandings: 35,614
Total Encounters: 19,351Total Bandings: 31,945
Total Encounters: 1,586Total Bandings: 13,156,364
Total Encounters: 1,715,418Total Bandings: 7,661,115
Total Encounters: 600,865Total Bandings: 5,636,160
Total Encounters: 1,385,582Total Bandings: 2,798,024
Total Encounters: 123,735Total Bandings: 2,077,121
Total Encounters: 59,838DucksSlate-Colored JuncoDoves and PigeonsMourning DoveShorebirds
Total Bandings: 885,736
Total Encounters: 14,091Raptors (including Owls)Sharp-Shinned HawkSemipalmated
Sandpiper800,000600,000400,000200,0000
0
51960 1970 1980 1990 2000 201024,00016,0008,0000
0
51960 1970 1980 1990 2000 201016,0008,0000
0
51960 1970 1980 1990 2000 201016,0008,0000
0
51960 1970 1980 1990 2000 20104,000
0
0
5
10
151960 1970 1980 1990 2000 20104,000
0
0
51960 1970 1980 1990 2000 2010Near Passerines and PasserinesBird Groups with Total Number of Bandings over 500,000MallardSooty TernCanada GooseLoons and GrebesSwansAlcids24,000Bird Groups with Total Number of Bandings under 500,000Eared GrebeWhistling Swan
Thick-Billed MurreAmerican CootBirds BandedNumber of Times Previously Banded Birds Were Encountered1–4
5–49
50–499500–4,999
5,000–49,999
50,000+Number
of Birds
0Herons, Ibises, Rails and Other Marsh BirdsMarch 2021, ScientificAmerican.com 55The large numbers of encounters in this group
of seabirds ( below ) result partly from re sightings
of long-lived albatrosses on breeding grounds.