Mark Harper
World Birder
Interesting thread and fortunately Wildlife Recorder has a feature that creates report for you on genera, which enables me to see I have seen 1,783 (IOC).
Phylloscopus with 57 out of 80 is the most I have seen.
Tringa with 13 is the largest complete genus, although there are 5 others with only one missing that are larger (Calidris, Larus, Vanellus, Circus and Acanthiza)
The largest genera that I haven't see any of are Geospiza (Galapagos Finches) and Sheppardia (Akalats) both with 9 species.
Phylloscopus with 57 out of 80 is the most I have seen.
Tringa with 13 is the largest complete genus, although there are 5 others with only one missing that are larger (Calidris, Larus, Vanellus, Circus and Acanthiza)
The largest genera that I haven't see any of are Geospiza (Galapagos Finches) and Sheppardia (Akalats) both with 9 species.