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%
4%
5%
84
flagUkraine
8%
75%
8%
8%
24
flagthe United Arab Emirates
14%
71%
7%
7%
14
flagPoland
16%
62%
6%
13%
5875
flagthe Philippines
10%
60%
10%
14%
28
flagRepublic of Ireland
17%
60%
8%
13%
23
flagSpain
20%
60%
0%
20%
10
flagPakistan
5%
58%
16%
19%
36
flagCanada
12%
58%
16%
12%
24
flagGreece
16%
58%
0%
25%
12
flagthe United Kingdom
23%
57%
4%
13%
169
flagthe United States
13%
56%
9%
17%
415
flagIndia
14%
56%
10%
16%
190
flagthe Netherlands
16%
55%
0%
27%
18
flagFrance
27%
55%
0%
16%
18
flagSingapore
7%
53%
7%
30%
13
flagUnknown
20%
44%
11%
24%
79

Gender

men55%
women52%
Chitin
22%
23%
Keratin
55%
52%
Bone
8%
5%
Mineralized tissue
13%
18%

Details

Author: globalquiz.org
Illustration: Bernard Spragg. NZ
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