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Message: <blockquote data-quote="dantheman" data-source="post: 1699468" data-attributes="member: 32998">It wasn't the observation I was questioning, it was your conclusions I was querying. Sorry if this were not clear. I agree with you that your question in post 1 is 'why don't birds sing during the day(as a rule).'a) It could be that they are unavailable due to the nesting changeover you mention (although I, along with others think this is not the case, as a cause).b) It could be that they don't need to. They have already sung in the morning, the optimal time (for the reasons mentioned much earlier in the thread), and they do of course need some respite time to feed etc.So you are right, inasmauch as they are unavailable. They would drop dead of starvation, drop out of the gene pool/go extinct if they sang as much in the day as at the other times we note them singing.It's interesting, agreed. Another way of looking at it, but not necessarily the cause.I am sure there is more/has been study done on this ... in some papers somewhere ... If not, then of course we can't discount it totally out of hand.(And yes, apologies, my post (and possibly this one too?) does read as patronisingly as any on this thread ... not really my main intention ... soz <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" /> )</blockquote>