That's because a camel does not represent Perl. It reprents O'Reilly media, who uses the image of a camel to sell Perl books. This is not to diss O'Reilly, who have always been very supportive of Perl. The image of Perl is an onion.
I suppose that means we should have a poll about favourite soup ingredients.
• another intruder with the mooring in the heart of the Perl
The past poll was seven years ago, and didn't include animals that people are likely to keep (other than on O'Reilly book covers). But using that criteria, I guess camel does apply in some parts of the world.