Both the Not Quite Scilly and Wanstead Birder blogs have touched on this subject recently, and I'm not one to pass over the opportunity to nick a good idea...
Phasing - the lessening (or even dropping) of time spent bird watching. Most long-time birders have gone through spells of it. I certainly have. In fact, because of my other natural history interests, birding has sometimes taken a back seat for months on end. I don't quite accept that as phasing however, as I'm still out in the field, still looking at and identifying living things, but instead of birds they are plants, butterflies, moths or dragonflies. No, to phase is to completely close down. I've certainly lessened birding time in the past, but have I ever 'retired' from it? I'm not so sure.
Whenever I go on a long birding trip (a fortnight on Scilly, a month at Dungeness) I cannot bird at full throttle throughout. I slow down, I need a change, my mind demands it. That can mean just pottering around, drinking tea, chatting (not about birds!) and reading (not about birds!!). It is a version of recharging my batteries, pushing a reset button. I have found that if I bird, full-on, for several days, I start to get 'call blindness' - I lose the ability to pick out calls clearly. You would think the opposite would be true. I will, after hours (or days) in the field, start to lose focus and engage in bouts of day-dreaming. That's no way to nail a Blyth's Pipit.
I'll admit to not being a manic birder. I used to think I was, but no, that title is for others. I know a few. Some of them are out, for days on end, but for different reasons. To some, they just love birding so much that they can think of nothing more pleasurable to do. For others, it's a reason to not be at home. To some, they worry that their place in the birding world might be compromised if they are not seen to be putting the time in. For such a sedate and passive pastime there are layers of reason (and angst) to be identified.
I can lose interest. I will adopt patches, bird them avidly and then drop them just as quickly. Sometimes I'll return to them but others abandon for good. This is my way of staving off phasing. When I have pursued a project for too long I can get close to that 'point of no return' when complete abstinence is a distinct possibility.
I have been told that I think too much about the why's and wherefore's of all this birding lark. Maybe so, but it's what comes naturally to me.