<Tr> <Td> Domestic pig </Td> <Td> 7009222000000000000 ♠ 2,220,000,000 </Td> <Td> </Td> <Td> </Td> <Td> <Ul> <Li> </Li> </Ul> </Td> <Td> </Td> </Tr> <Tr> <Td> Springbok </Td> <Td> 7009272000000000000 ♠ 2,720,000,000 </Td> <Td> </Td> <Td> </Td> <Td> <Ul> <Li> </Li> </Ul> </Td> <Td> </Td> </Tr> <Tr> <Td> Blesbok </Td> <Td> 7009306000000000000 ♠ 3,060,000,000 </Td> <Td> </Td> <Td> </Td> <Td> <Ul> <Li> </Li> </Ul> </Td> <Td> </Td> </Tr> <Tr> <Td> Blue - and - yellow macaw </Td> <Td> 7009313600000000000 ♠ 3,136,000,000 </Td> <Td> </Td> <Td> Brain only </Td> <Td> </Td> <Td> </Td> </Tr>

How many brain cells are in the brain