To re-cap, galls are formed by the interaction of animal and plant. Irritated by wasp, mite, aphid, midge, even nematode, etc., the plant is stimulated into forming a growth which is then used by the animal to protect its eggs, foster its larval stages, etc. Galls can be found on all parts of a plant, leaves, flowers, stems, bark, roots. The most obvious are the ones on the leaves, and oaks in particular seem to have a strong affinity, if that’s the word, for gall-making insects that create oddly wonderful oak “apples.” The plant is generally not harmed by this interrelationship, the benefits of which are partaken by well over 1000 (in North American) species of insects.
amphibians ants Arizona bees beetles birding birds books Brooklyn Brooklyn Botanic Garden Brooklyn Bridge Park butterflies Cape May caterpillars Catskills Central Park cicadas Climate crabs Croton Point damselflies Dartmoor Dead Horse Bay dragonflies fish flowers Floyd Bennett Field Fort Tilden Four Sparrow Marsh frogs fungus galls Gastropoda Geology Gowanus Green-Wood harbor honey bees horseshoe crab Hudson Iceland insects invertebrates Jamaica Bay ladybugs Maine mammals Marine Park mollusca Montreal moths mushrooms Nantucket New Mexico New York Botanical Garden Odonata owls plants Prospect Park Ranger Robin Red Hook reptiles shells slugs snails spiders St. John Staten Island Texas Thoreau trees turtles Virgin Gorda wasps Wheeler Woods
This work by Matthew Wills is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License.