Post by matt on Mar 19, 2020 21:13:37 GMT
Yeah my theory is that it varies even depending on the local food source. I know that my local bluetits spend almost all of their time foraging in two really big oak trees two gardens over, when they are feeding their young. Maybe this is such an important food source here, that they wait for it to be in leaf before they start nesting? Just a theory, of course, but perhaps in other localities it is hawthorn or something else, and that is in leaf already (here too), so they go earlier? Or am I just trying to justify a lack of action 
