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
6%
79%
6%
7%
63
flagRepublic of Ireland
7%
69%
15%
7%
13
flagthe Philippines
7%
65%
11%
11%
26
flagthe Netherlands
0%
63%
0%
36%
11
flagFrance
15%
61%
0%
23%
13
flagPoland
17%
60%
6%
14%
3762
flagPakistan
4%
60%
16%
20%
25
flagSpain
20%
60%
0%
20%
10
flagIndia
13%
56%
8%
19%
128
flagthe United States
15%
55%
10%
16%
306
flagthe United Kingdom
25%
55%
5%
12%
110
flagCanada
15%
53%
15%
15%
13

Gender

men56%
women52%
Chitin
21%
24%
Keratin
56%
52%
Bone
9%
4%
Mineralized tissue
12%
18%

Details

Author: globalquiz.org
Illustration: Bernard Spragg. NZ
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