Which birds use their beaks upside down?

toucans
flamingos
storks
penguins
Flamingos filter-feed on brine shrimp and blue-green algae. Their beaks are specially adapted to separate mud and silt from the food they eat, and are uniquely used upside-down. The filtering of food items is assisted by hairy structures called lamellae which line the mandibles, and the large rough-surfaced tongue.
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toucans
flamingos
storks
penguins
answers
flagFinland
4%
90%
0%
4%
21
flagthe United Arab Emirates
9%
85%
0%
0%
21
flagSwitzerland
26%
66%
3%
3%
30
flagSweden
34%
63%
0%
2%
38
flagItaly
34%
62%
2%
0%
35
flagNorway
32%
61%
0%
3%
31
flagAustralia
16%
58%
20%
4%
24
flagthe Netherlands
36%
57%
1%
4%
71
flagthe United Kingdom
39%
52%
4%
3%
406
flagFrance
43%
51%
0%
5%
37
flagGermany
43%
49%
2%
3%
187
flagPoland
42%
48%
3%
4%
16084
flagRepublic of Ireland
32%
45%
8%
10%
46
flagIndia
30%
44%
17%
7%
169
flagthe United States
39%
43%
13%
3%
456
flagSpain
45%
40%
4%
9%
22
flagDenmark
38%
38%
5%
16%
18
flagUnknown
50%
36%
7%
5%
685
flagCanada
44%
33%
5%
8%
36
flagAustria
60%
30%
0%
10%
20