The Cambridge Declaration on Consciousness

…the weight of evidence indicates that humans are not unique in possessing the neurological substrates that generate consciousness. Nonhuman animals, including all mammals and birds, and many other creatures, including octopuses, also possess these neurological substrates. (Source)

This declaration was made on July 7, 2012.

Here is a report on the declaration: Scientists Finally Conclude Nonhuman Animals Are Conscious Beings.