With the harrier comes what they call 'the pig circus' – us lot, the RSPB, the birders, the wildlife-crime copper.
Mr Souder also makes some intriguing points about transatlantic tensions among naturalists.Although Audubon came to owe his career to the English, he had earlier dismissed European birders as "cabinet ornithologists".
It risks becoming "muzzled by its fear of losing members", says Mark Cocker, an expert on birds and birders, perhaps preventing the charity from taking a hard political stance.
It also risks alienating the most dedicated birders.
Though he accepts that all feather fanatics and readers will not be "die-hard birders" like himself, he urges them at least to be bird advocates so that future generations can admire and learn from the species.
It was a fertile time for the world's birders.
British birders travel far more than others, says Mark Cocker, a shrewd observer both of birds and of the people who are obsessed with them.
The recession may have squeezed some birders.
Today, most taxonomists and birders classify finches as members of the family Fringillidae.
Cornell's programs in particular became a model; their various bird-watching programs have attracted more than 200,000 participants, estimated to be but a small fraction of the millions of birders whose observations could be leveraged.
In a video, the naturalist thanked fans for their support and urged them to join the RSPB, Birders Against Wildlife Crime, League Against Cruel Sports and to read Mark Avery's book Inglorious about driven grouse shooting.
