Birda's session and sightings feature allow you to enter the number of individual birds you saw in a sighting. How you do this depends on how you are recording your bird sightings.
Live Session Mode
Simply tap on the + icon next to a species to add an additional counts for the species. E.g. See two American Robins, then tap the + twice for the American Robin. See another three American Robins, then just tap again three times!
If you see a very large flock of birds then to save you tapping hundreds of times simply long press on the + button and manually enter the count. Whatever you enter her will add to the existing count for the speices. E.g. If you have already counted 20 Snow Geese and then see another 50, then simply long press + for Snow Geese and enter 50. This will automatically add towards your existing total to give you a total count of 70.
Add Sighting
When you are adding a sighting, you can add a count in the sighting detail section when you land of the summary screen.