here’s/here are: Common Errors in English Usage Entry for Wednesday, September 10, 2014

here’s/here are
Sentences like “here’s the gerbil” are shortened ways of saying “here is the gerbil.” But “here’s the gerbils” is wrong because “here’s” is not a contraction of “here are.” In speaking we might say “here’re the gerbils,“ but we probably would not use the contracted form in writing unless we were trying to convey the effect of spoken English. Instead write “here are the gerbils.”