If it ain’t broke, don’t fix it. ~Thomas Bertram Lance
I have found this interactive mapping resource to be exceptionally useful and so I fully recommend this tool for any of your tracking needs of this nature. The free version shows you all locations but limits you to 200 for marking as found. It also shows you all of the animals it has heat maps for, but limits you to which animals you can get heat maps for. There are also ads that show on the page. A one time payment will remove the ads, unlock all the animal heat maps for use and allow you to mark as found an unlimited number of locations. The location feature, by the way, is exceptionally on-point. Additionally, this map system offers online locations, too.