What evidence does Les mention about a Middle Eastern scavenger bird multiplying?
The evidence cited is a reported observation: a major Middle Eastern scavenger bird normally laid only two eggs, producing two offspring yearly. Later reports claimed the same species doubled, laying four eggs and producing four. It was said to be more or less documented that this scavenger bird was multiplying at nearly double its normal Middle Eastern rate.
Les explains that the passage describes scavenger birds, or vultures, gathering to the supper of the great God to eat the flesh of kings, captains, mighty men, horses, and all men after a great conflagration, especially in the Middle East. These birds of prey would have a cleansing effect, preparing the earth for the coming kingdom, and the Old Testament speaks of this event when scavenger birds feast on the gathered armies. Les then mentions evidence he heard years ago: someone told him of an article saying one major Middle Eastern scavenger bird normally laid two eggs at a time, usually only one brood, so only two offspring a year. Later he read again that it is more or less documented that this specific species is multiplying at almost double normal in the Middle East. He notes he takes such reports with a grain of salt.