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
10%
77%
5%
7%
70
flagRepublic of Ireland
5%
72%
11%
11%
18
flagthe Philippines
11%
62%
11%
11%
27
flagFrance
18%
62%
0%
18%
16
flagPoland
17%
61%
6%
14%
4426
flagSpain
20%
60%
0%
20%
10
flagPakistan
7%
59%
14%
18%
27
flagIndia
13%
58%
8%
17%
159
flagSingapore
8%
58%
8%
25%
12
flagCanada
12%
56%
12%
18%
16
flagthe Netherlands
12%
56%
0%
31%
16
flagthe United States
13%
55%
10%
17%
356
flagthe United Kingdom
27%
53%
5%
12%
120
flagUU
19%
38%
16%
25%
31

Gender

men57%
women52%
Chitin
20%
23%
Keratin
57%
52%
Bone
9%
5%
Mineralized tissue
12%
18%

Details

Author: globalquiz.org
Illustration: Bernard Spragg. NZ
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