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.
globalquiz.org
0
Correct this question
5
Very interesting!
reach: rather globalbeakbiologybirdsornitologyzoology

Answers by country

Chitin
Keratin
Bone
Mineralized tissue
answers
flagSweden
8%
83%
0%
8%
24
flagAustralia
16%
65%
5%
11%
60
flagAustria
16%
62%
8%
10%
37
flagPakistan
7%
60%
11%
19%
84
flagCanada
10%
57%
18%
13%
38
flagUnknown
10%
56%
16%
16%
48
flagthe United Kingdom
15%
55%
12%
14%
210
flagGermany
32%
55%
3%
8%
193
flagBelarus
5%
51%
17%
25%
35
flagMalaysia
8%
51%
8%
28%
35
flagIndia
18%
50%
11%
17%
696
flagthe United States
16%
50%
11%
19%
562
flagUkraine
17%
50%
11%
18%
143
flagSwitzerland
20%
50%
0%
30%
20
flagPoland
22%
49%
9%
18%
9996
flagRussia
15%
49%
16%
17%
132
flagNigeria
25%
48%
6%
19%
31
flagSingapore
14%
47%
9%
28%
21
flagKazakhstan
23%
42%
19%
14%
21
flagthe Philippines
25%
38%
15%
19%
63