What is a bird beak made of?

Chitin
Keratin
Bone
Mineralized tissue
There are two main types of keratin pro­tein­s. The e α-k­er­atins are the main struc­tural com­po­nents of hair, nails, horns and claws of mammals. The harder β-k­er­atins are found the scales and claws of rep­tiles, tortoise shells, and in the feath­er­s, beaks, claws of birds.

Answers distribution

Chitin
Keratin
Bone
Mineralized tissue
answers
flagGermany
10%
79%
5%
6%
100
flagUkraine
11%
73%
5%
8%
34
flagSpain
15%
69%
0%
15%
13
flagRepublic of Ireland
18%
68%
4%
9%
44
flagthe United Arab Emirates
20%
66%
6%
6%
15
flagthe Netherlands
17%
62%
3%
17%
29
flagFrance
20%
62%
0%
16%
24
flagGreece
19%
61%
0%
19%
21
flagAustralia
7%
61%
7%
15%
13
flagPoland
17%
60%
7%
14%
8479
flagthe United Kingdom
19%
60%
6%
12%
208
flagPakistan
9%
58%
13%
17%
51
flagCanada
14%
57%
14%
14%
28
flagSweden
14%
57%
0%
28%
14
flagItaly
28%
57%
0%
14%
14
flagSingapore
7%
57%
7%
28%
14
flagthe Philippines
15%
56%
10%
15%
46
flagIndia
15%
55%
10%
16%
278
flagthe United States
15%
54%
10%
17%
468
flagUnknown
19%
42%
15%
22%
453

Gender

men49%
women51%
Chitin
21%
23%
Keratin
49%
51%
Bone
11%
6%
Mineralized tissue
16%
18%

Details

Author: globalquiz.org
Illustration: Bernard Spragg. NZ
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