Galls
Insect plant galls are fascinating plant growths caused by Gall Wasps, Midges or Sawflies. Galls typically develop after the larvae of one of these insects releases a chemical that causes the plant to swell and grow. This is typically done during the growth cycle of the plant (mainly Spring) so the gall grows very quickly. As the growth gets larger, the larva also grow inside.
The galls are a microhabitat for the larvae being a house as well as a food source (the nutritious and starchy inside). Amazing shapes and colors develop which are determined on the chemical released , the plant it's growing on and where on the plant it is. Many are so distinct that the species of insect can be known just by the look of the gall. The larvae eventually eat their way out when they're developed to live their adult lives outside.
The galls on this page are from San Diego County unless noted. Hovering over an image will display the common and scientific names. Images of galls will open in a separate tab when clicked. You will be directed to the Project Noah page for that organism that shows various angles, description of the species and the habitat/location it was found.
The galls are a microhabitat for the larvae being a house as well as a food source (the nutritious and starchy inside). Amazing shapes and colors develop which are determined on the chemical released , the plant it's growing on and where on the plant it is. Many are so distinct that the species of insect can be known just by the look of the gall. The larvae eventually eat their way out when they're developed to live their adult lives outside.
The galls on this page are from San Diego County unless noted. Hovering over an image will display the common and scientific names. Images of galls will open in a separate tab when clicked. You will be directed to the Project Noah page for that organism that shows various angles, description of the species and the habitat/location it was found.
