Hi,
I have found this site very useful, and have been using it to go through birds in this Blue Mountains bird list. Most listings have an audio recording of the bird calls, which are most useful as many birds are heard more often than they are seen. For the listings that do not currently have bird recordings, a simple fix could be to link to another source of calls, be it a video or audio. Listings that do not have recordings include:
- Tree martin: alternative video
- Rock dove: alternative video
- White-headed pigeon: alternative audio
- Brown cuckoo dove: many recordings
- Emerald dove: no listing, search results
- Common Bronzewing: alternative audio
- Brush Bronzewing: alternative audio
- Crested pigeon: video, info from your sister site
- Peaceful Dove: video
- Bar-shouldered Dove: calls
- Wonga pigeon: alternative video
- Wompoo Fruit-Dove: video
- Superb Fruit-Dove: video
- Topknot Pigeon: two calls
- Shining bronze cuckoo: calls
- Oriental cuckoo: calls