PhD study of birding couples(Cliff Dent)

‘Fewer participants belonged to the American Birding Association than the
Audubon Society or chapters, and most preferred to travel independently of
organised tours. One explanation for both these findings might be that
female participants in particular were less interested in activities or
trips that focused solely on birding, particularly where it was intensive.
And because most participants (particularly men) reported that they
preferred to watch birds with their spouse they might eschew such
activities and trips in favour of those that they both enjoy.’

We are a birding couple and the reason we don’t go on organised birding
tours is the cost.
Cheers
Cliff