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USDA Forest Service

USDA Forest Service

The U.S. Department of Agriculture Forest Service is a Federal agency that manages public lands in national forests and grasslands. The Forest Service is also the largest forestry research organization in the world, and provides technical and financial assistance to state and private forestry agencies. Gifford Pinchot, the first Chief of the Forest Service, summed up the purpose of the Forest Service—"to provide the greatest amount of good for the greatest amount of people in the long run."
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44 Images of 10 Subjects View Subject List View Image Details View Thumbnails

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Image Subject Name Scientific Name Description
1484011 oak bullet gall Disholcaspis quercusglobulus galls
1398069 acorn-plum gall Amphibolips quercusjuglans galls
1457017 oak bullet gall Disholcaspis quercusglobulus Bullet galls formed on the twigs of a young white oak. Also found on neighboring burr oak. Galls secrete a honeydew substance that attracts insects such as wasps, bees and flies.
3056042 large oak-apple gall Amphibolips confluenta gall on oak
1470114 horned oak gall Callirhytis cornigera
5288018 erythrina gall wasp Quadrastichus erythrinae male and female  
5288019 erythrina gall wasp Quadrastichus erythrinae
1396083 horned oak gall Callirhytis cornigera Shawnee National Forest
3056041 large oak-apple gall Amphibolips confluenta gall (at right) on Nuttall oak
0795071 pine shoot gall sawfly Xyela gallicaulis galls on loblolly pine shoots
1398081 oak apple gall Amphibolips spp. developing gall.
5424270 oak apple gall Amphibolips spp. Two galls, one with a exit hole. 
5424271 oak apple gall Amphibolips spp. Two galls, one with an exit hole.
5424272 oak apple gall Amphibolips spp. Two galls, one with an exit hole
1396078 Cynipid gall wasp Andricus ignotus gall on oak; agamic generation
0488065 pip gall wasp Callirhytis operator to acorn
5179026 erythrina gall wasp Quadrastichus erythrinae
5179055 erythrina gall wasp Quadrastichus erythrinae Lightly infested tree
5179056 erythrina gall wasp Quadrastichus erythrinae Lightly infested tree Miami Metro Zoo
5179021 erythrina gall wasp Quadrastichus erythrinae
5179023 erythrina gall wasp Quadrastichus erythrinae
5179025 erythrina gall wasp Quadrastichus erythrinae Leaf galls due to erythrina gall wasp, feeding damage caused by little leaf notcher weevil, Myllocerus undecimpustulatus undatus
5179032 erythrina gall wasp Quadrastichus erythrinae
5179034 erythrina gall wasp Quadrastichus erythrinae
5179035 erythrina gall wasp Quadrastichus erythrinae
5179036 erythrina gall wasp Quadrastichus erythrinae
5179038 erythrina gall wasp Quadrastichus erythrinae
5179041 erythrina gall wasp Quadrastichus erythrinae Shoot damage by Erythrina borer, Terastia meticulosalis, also exhibited
5179046 erythrina gall wasp Quadrastichus erythrinae
5179047 erythrina gall wasp Quadrastichus erythrinae
5179048 erythrina gall wasp Quadrastichus erythrinae
5179049 erythrina gall wasp Quadrastichus erythrinae
5179050 erythrina gall wasp Quadrastichus erythrinae
5179051 erythrina gall wasp Quadrastichus erythrinae
5179052 erythrina gall wasp Quadrastichus erythrinae
5179053 erythrina gall wasp Quadrastichus erythrinae
5179054 erythrina gall wasp Quadrastichus erythrinae
5179058 erythrina gall wasp Quadrastichus erythrinae
5179059 erythrina gall wasp Quadrastichus erythrinae
5179060 erythrina gall wasp Quadrastichus erythrinae
1470113 horned oak gall Callirhytis cornigera
1398068 acorn-plum gall Amphibolips quercusjuglans Two plum galls formed on the outside of an acorn cup, photo taken in Sawyer Co., WI.
1396082 horned oak gall Callirhytis cornigera
0488064 stony gall Callirhytis fructuosa cross section of gall in acorn

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