Those species we want to keep hearing about, even if already reported for the year, or the season. They're either rare (e.g. Red Goshawk), localised (e.g. Yellow-throated Miner), cryptic (e.g. owls, button-quail and crakes), unpredictable (e.g. various waterbirds and raptors), or migrants/nomads of local/national interest (e.g. swifts).