Do you mean honey bees because those would be more like looking to cows or sheep population as a metric of general wild animal population. My area of SoCal is

Do you mean honey bees because those would be more like looking to cows or sheep population as a metric of general wild animal population. My area of SoCal is HOA/office park “landscaped” with near zero variety of plants for miles around. There are very few flying insects in my yard. I did attract some caterpillars this year, but they are very particular about plants. The caterpillar on the native gooseberry stays there, the tomatoes get hornworms and the other plant gets budworms. Bugs can be very specific and the grass and office park shrub monoculture around is not supportive of a diverse insect population.