It is instances like this that make one hesitate to dogmatise too much as to the why and wherefore of bird-ways.
"Wild Life in a Southern County"
Richard Jefferies
And as the faith in the truth of systems dwindled, the marks of demarcation between them faded; men were less inclined to dogmatise, and began to select and combine elements from long discordant schools.
"Roman Society from Nero to Marcus Aurelius"
Samuel Dill
No one should dogmatise on uncertainties, and after death everything is doubtful.
"The Memoires of Casanova, Complete The Rare Unabridged London Edition Of 1894, plus An Unpublished Chapter of History, By Arthur Symons"
Jacques Casanova de Seingalt