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
12%
76%
5%
6%
75
flagthe United Arab Emirates
9%
72%
9%
9%
11
flagRepublic of Ireland
10%
68%
10%
10%
19
flagPoland
16%
62%
6%
13%
4923
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
flagIndia
13%
57%
9%
18%
171
flagPakistan
7%
57%
14%
21%
28
flagthe United States
13%
56%
10%
16%
380
flagthe United Kingdom
25%
56%
4%
12%
148
flagCanada
10%
55%
20%
15%
20
flagFrance
27%
55%
0%
16%
18
flagthe Netherlands
17%
52%
0%
29%
17
flagUnknown
19%
44%
12%
23%
47

Gender

men56%
women52%
Chitin
21%
24%
Keratin
56%
52%
Bone
8%
5%
Mineralized tissue
12%
17%

Details

Author: globalquiz.org
Illustration: Bernard Spragg. NZ
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