In the days that followed, Meredith chose to move further south, where the birds were "reported to be fairly tame",[11] but there was only limited success in spite of his efforts.[2] By the fourth day of the campaign, army observers noted that "each pack seems to have its own leader now – a big black-plumed bird which stands fully six feet high and keeps watch while his mates carry out their work of destruction and warns them of our approach."[12] At one stage Meredith even went so far as to mount one of the guns on a truck: a move that proved to be ineffective, as the truck was unable to gain on the birds, and the ride was so rough that the gunner was unable to fire any shots.[2] By 8 November, six days after the first engagement, 2,500 rounds of ammunition had been fired.[6] The number of birds killed is uncertain: one account estimates that it was 50 birds,[6] but other accounts range from 200 to 500—the latter figure being provided by the settlers. Meredith's official report noted that his men had suffered no casualties.[2]