The tag alias #76934 canine -> canid is pending approval.
Reason: HEAR ME OUT.
Canid is a tag that includes canine, fantasy creatures, and a couple extinct species. Fantasy creatures are probably more frequently tagged canine- compare the page counts for pokemon canid -canine to pokemon canine. Canid -canine has very very few of the extinct species (all extant canids are canines) and a lot of hybrids, generic wolfoxdogs (which also get tagged canine), and fantasy species. Because fantasy and generic species get tagged both canid and canine there isn't much utility for this search.
And yes, this also likely applies to other family tags like felid/feline or equid/equine but before putting in the work for those I wanted to see if there'd be support for this.