Category Archives for // insect
September 8, 2017


Queen and Viceroys mimic Monarch butterflies to escape predators.

July 26, 2017

Second Annual Grasshopper Walk

One of the most important food items for nesting birds is grasshoppers. Last year the Chico grasshopper field trip tallied 41 grasshopper species. On August 5th, starting at 0730 at headquarters, we will try see what new species we can add to the list that already has over 50 grasshopper species on it. Because there are so many different micro-habitats, we will visit as many as time allows.  We hope to see representatives of all the grasshopper groups, Pygmy Grasshoppers

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July 25, 2017

Black Lights and UV Lights Attract Insects

Chico’s first ever Moth Night was held on July 22 at the Bell Grove.  Four setups including this one were erected in various parts of the grove including the platform where bands play.  This setup used an incandescent light source while others used ultraviolet light and black lights to pull in insects from far away. Studies have shown that black light and UV wave lengths attract more insects than incandescent light goes. The UV light seemed to attract the most

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March 6, 2017

Bird Food: Bot Flies

Other than entomologists, almost nobody likes flies.  But some fly species are extremely specialized and some are colorful.  The largest bird family in the world is called Tyrant Flycatchers although the members of the family eat many more species of insects than just flies. One of a group of flies of interest is called bot flies and a bumblebee mimic.  This deer bot fly is an adult and it has no visible/usable mouth because it only lives a short time

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February 13, 2017

Grasshopper Nymphs

Why is a Northern Green-striped Grasshopper brown and where are its wings? Some grasshopper species overwinter as nymphs and as a result their wings are not fully developed in February or March.  This is a very common Chico species but unfortunately there was a major outbreak last spring and summer and as a result many of the young green ash trees were completely defoliated by this and a couple other grasshopper species  Although green-striped is part of its name, there

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June 24, 2016

Bird Food: Digger Bees

Each summer on the Chico High Road, a careful observer will see about a thousand bees burrowing on the road. Today the bees were easy to find because young Horned Larks were also present and the birds were eating some of the bees.  These bees are a type of digger bee in a group called Diadasia, a colonial nesting species.  Females emit a pheromone which attracts males and here are two groups of bees, mostly males attempting to mate with

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