At 46 kHz more likely to be little forest bat. It's not possible to ID from the spectrogram you've shown. You need to expand the time (bottom scale) so the shape of the pulses can be clearly seen.
Ok I'm about to add 3 more screenshots from different pulses in the same recording. The lowest one starts at 46, others are around 48-49KHz. Let me know if this helps!
Thanks, you still need to further expand the time scale , if you can include the cursor or bar in the screenshot so the frequency is known it will also help