5 ideas
The Asian koel lays its eggs in house crows' nests. In the widely told Indian account of the practice, the conspicuous male provokes the crows into chasing him while the drab female slips in to lay, and the crows then raise the koel chicks as their own. The episode is a concrete test case for whether a behaviour that looks like coordinated strategy is truly cooperative, and for how much of the observer's story comes from seeing versus inferring.
Much of what is written about common birds is copied from earlier books rather than checked in the field, so errors spread and harden into accepted fact. The only corrective is repeated, patient, first-hand watching. That watching often shows the familiar bird doing something the books say it does not do.
The same call gets transcribed into very different words depending on the hearer's language and expectations. The common hawk-cuckoo is the British 'brain-fever bird' but carries other names in Indian languages. Treating a written call as data about the human ear, not the bird, prevents mistaking a mnemonic for an accurate description of the sound.
Crows, mynas, drongos and other everyday birds are ignored because they are familiar, yet their abundance and nearness make them the best subjects for sustained observation. Familiarity is a reason to look harder, since the watcher can see the same individuals daily and catch rare behaviours.
A sound field note records the observed act first: posture, sound, sequence and context. Interpretation of motive or purpose is kept as a distinct and provisional layer. This guards against both sentimental anthropomorphism and dry textbook dogma, because every conclusion stays traceable to something actually witnessed.