Do omnivorous corvid species actually need grit?
All of our native corvid species seem to use, at least to some degree, grit to aid digestion, which is particular evident in jackdaws, carrion crow and ravens. It is assumed that this helps to break down the ingested food. In jackdaws and carrion crows there is also evidence that calcareous grit is an essential source of calcium in particular needed for eggshell formation. Please follow the link below to read the full blog post.