characteristics of birds

Birds
Which of these is a bird?
69
Birds
How are fish and birds similar?
66
Birds
What do birds and reptiles have in common?
149
Birds
What is birds in simple words?
77
Birds
What family is the bird in?
67
Birds
How are penguins considered birds?
27
Birds
Do birds of paradise live in Africa?
106
Birds
What is the classification of birds?
121
Birds
What makes birds unique from other animals?
68
Birds
What is the correct class of birds?
169