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%
76%
5%
6%
77
flagUkraine
7%
69%
15%
7%
13
flagRepublic of Ireland
10%
68%
10%
10%
19
flagthe United Arab Emirates
16%
66%
8%
8%
12
flagPoland
17%
62%
6%
13%
5373
flagthe Philippines
10%
60%
10%
14%
28
flagSpain
20%
60%
0%
20%
10
flagGreece
20%
60%
0%
20%
10
flagSingapore
8%
58%
8%
25%
12
flagthe United Kingdom
24%
57%
5%
12%
156
flagthe United States
13%
56%
10%
17%
398
flagIndia
13%
56%
10%
17%
180
flagFrance
27%
55%
0%
16%
18
flagCanada
13%
54%
18%
13%
22
flagPakistan
6%
53%
16%
23%
30
flagthe Netherlands
17%
52%
0%
29%
17
flagUnknown
22%
40%
11%
25%
59

Gender

men55%
women52%
Chitin
22%
24%
Keratin
55%
52%
Bone
9%
5%
Mineralized tissue
12%
17%

Details

Author: globalquiz.org
Illustration: Bernard Spragg. NZ
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