tikuko you shouldn't make a judgement based on the top 8 bands. 8 isn't a sufficiently large enough sample-size where the population is 100 (as it is on these pages). Also "the top 8" isn't a random sample. For all we know people might generally prefer bands with birds in their names.
I think the best way to judge who is winning out of mammals and non-mammals is to bite the bullet and crunch the numbers. A count-up now shows that although it's even more of a close contest mammals are still in the lead; mammals have 47 points to non-mammals' 43.