I've just downloaded the manual and this is the page for the scene modes: https://download.nikonimglib.com/archive4/JdmEu00DfQTg04rJrFm43SNDaO51/P1000RM_(En)06.pdf
It doesn't appear to have Birdwatching included.
With a previous camera (Fuji) I used Sports Mode.
Here's a screenshot of the properties from one of my pictures taken on a P900 (I presume that the P950 would be similar)
Of course, some of the settings change according to the light conditions.
In addition you can adjust the EV to suit and select multi-shot.