The birds:

Chemical kin label in seabirds

"... mating preferences for particular MHC profiles based on chemical assessment have already been observed in fishes and mammals [24]. Our results suggesting that the same chemical assessment may exist in birds may explain behavioural data previously reported..."

and the bees:

Pheromone-mediated gene expression in the honey bee brain

"We tested the hypothesis that queen mandibular pheromone (QMP) causes changes in gene expression in the brain of the adult worker honey bee, and that these changes can be correlated to the downstream behavioral responses induced by QMP."