Hello Dileep,
Without iron-rich hemoglobin turning their blood a recognizable red, certain animals have had to make do with copper-based pigment hemocyanin.
Some animals that bleed blue are as follows:
Birds have the same colour of blood as humans, i.e. red because of the presence of haemoglobin.
Hope this helps you. We wish you the best for your future endeavours!
Regards
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