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
11%
77%
5%
5%
88
flagUkraine
12%
71%
6%
9%
32
flagthe United Arab Emirates
14%
71%
7%
7%
14
flagSpain
16%
66%
0%
16%
12
flagPoland
17%
61%
6%
13%
6904
flagFrance
23%
61%
0%
14%
21
flagthe United Kingdom
21%
60%
5%
12%
188
flagPakistan
9%
58%
14%
17%
41
flagthe Philippines
10%
58%
10%
17%
29
flagCanada
12%
58%
16%
12%
24
flagRepublic of Ireland
23%
57%
7%
11%
26
flagGreece
14%
57%
0%
28%
14
flagthe United States
13%
56%
10%
17%
435
flagIndia
14%
56%
11%
16%
210
flagthe Netherlands
20%
55%
0%
25%
20
flagSingapore
7%
53%
7%
30%
13
flagUnknown
21%
40%
17%
21%
223

Gender

men52%
women52%
Chitin
21%
23%
Keratin
52%
52%
Bone
10%
5%
Mineralized tissue
15%
18%

Details

Author: globalquiz.org
Illustration: Bernard Spragg. NZ
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