This is an example of an "arbitrary inference".<span>
Arbitrary inferences allude to making conclusions without supporting and important data related to that. This incorporates "catastrophizing," or thinking about the host horrendous situation and results for generally circumstances. For instance, you trust that somebody doesn't care for you without genuine data to help that conviction.
</span>
American Robin eats insects such as earthworms and caterpillars. Just this knowledge is enough to know that it's not a herbivore: but it could be a carnivore. however, it also happily eats fruits and berries: so yes, it's an omnivore.