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Crow interaction

At ~9:25AM, two crows were flying north above Woodmont Avenue just south of Cordell Avenue. One repeatedly approached the other as they flew.

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Author David H.Posted on February 27, 2024

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Intermittent observations on the biota of Washington, DC and surrounding areas.

For additional resources, see:

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Links - local natural history and ecology

Acorn plum galls
American Academy of Allergy Asthma and Immunology's National Allergy Bureau
An Ecologically Annotated Checklist of the Vascular Flora at the Chesapeake Bay Center for Field Biology, with Keys (Updated Edition)
Biology and Food Habits of the Invasive Snail Allopeas gracile
Birds of DC
Camel Cricket
Carex (Cyperaceae) in the Potomac River Gorge of Maryland, Virginia, and the District of Columbia (2002)
Carex decomposita – Maryland (2005)
Children of the Earth (Stenopelmatus fuscus), cricket
Cluster flies
Common Spiders of Maryland (including goldenrod crab spider)
Conservation Gap Analysis of Native Magnolias of the U.S. and Canada
Deer Keds
Deer Wintering Areas
Featherbase
Flora of the Southern and Mid-Atlantic States by Alan S. Weakley
Flora of the Washington-Baltimore Area
Forgotten Grasslands of the South (Reed Noss)
House Sparrows, Bumpus
Larch Canker Pathogen (Lachnellula willkommii)
Maryland Biodiversity Project
Maryland winter tree identification key
Maryland's Frogs and Toads
Mole Crickets
Paper Wasps – Dominant, Subordinate
Peacock fly (goldenrod; gall forming)
Pennsylvania Amphibian and Reptile Survey
Phylogeography and population structure of the grape powdery mildew fungus, Erysiphe necator, from diverse Vitis species
Pollen Indicator for Baltimore (Owings Mills), Maryland National Allergy Bureau (NAB) Certified Pollen Counting Station: 1997-2012 Daily Pollen Data Recorded During the Pollen Season (February through October)
Powdery mildews on Quercus: A worldwide distribution and rediscovered holotype provide insights into the spread of these ecologically important pathogens (Erysiphe)
Raccoons
Southeastern Grasslands Inititative
The Jorō (Joro) spider was first spotted stateside around 2013 and has since been spotted across Georgia and the Southeast; orb-weaving spider is surprisingly tolerant of the vibrations and noise common in urban landscapes..
Vascular Plants of Maryland, USA: A Comprehensive Account of the State's Botanical Diversity Knapp and Naczi 2021
Virginia Land Snail – Opeas pyrgula
Wine science: powdery mildew, the wine world’s biggest problem
Wool Sower Gall Wasp

Identification Keys

Carex FNA key
Carya key: A Guide to the Identification of the Hickories of Southeastern Ohio (McCarthy 1985)
Common Spiders of Maryland (including goldenrod crab spider)
Deer Keds
Featherbase
First Report of Powdery Mildew Caused by Euoidium chrysanthemi on Chrysanthemum × morifolium in the United States
Flora of the Southern and Mid-Atlantic States by Alan S. Weakley
Grasses of Washington, DC – Smithsonian Institution Scholarly Press
Identification of Powdery Mildew Fungi
Key to Adult Insects
Maryland winter tree identification key
Maryland's Frogs and Toads
Mole Crickets
Paper Wasps – Dominant, Subordinate
Powdery mildews on Quercus: A worldwide distribution and rediscovered holotype provide insights into the spread of these ecologically important pathogens (Erysiphe)
Vascular Plants of Maryland, USA: A Comprehensive Account of the State's Botanical Diversity Knapp and Naczi 2021
Voles
Wool Sower Gall Wasp

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