The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Ug Media:
Sightings is an iPhone app that makes it easy to record location data for natural history observations. Youre out in the bush. You see a night parrot. You add a record in Sightings, start typing nigh, select night parrot from the auto-complete list, and you have a permanent record of the date, time and location of your sighting. Sightings comes preloaded with the common and scientific names of all Australian tetrapods (birds, mammals, reptiles, frogs), plus most Australian butterflies and dragonflies. You can also upload additional names if your taxon of interest is missing. Sightings can be used to record the location of anything, not just animals.You can then email the list of records to yourself, or connect your iPhone to your computer and download a CSV/GPX file through iTunes.Warning: Continued use of GPS running in the background can dramatically decrease battery life.