Fotos / Sonidos

Observ.

jimmoore

Fecha

Mayo 25, 2020 a las 02:07 TARDE EDT

Descripción

Rachel Carson Conservation Park, Montgomery County, Maryland; Sandy Spring quad

Fotos / Sonidos

Observ.

vvoelker

Fecha

Abril 2019

Fotos / Sonidos

Qué

Marmota de Vancouver (Marmota vancouverensis)

Observ.

johndreynolds

Fecha

Junio 25, 2015 a las 06:48 MAÑANA PDT

Descripción

This is "Alan", the day after he was first discovered. Unbelievable wanderer, hundreds of km from nearest mountain population. Trapped on 27 June and taken to a population on a mountain, where he lived for a couple more years.

Fotos / Sonidos

Qué

Zambullidor Pico Grueso (Podilymbus podiceps)

Observ.

willemspan

Fecha

Marzo 30, 2021 a las 10:51 MAÑANA EDT

Fotos / Sonidos

Observ.

hoaryherper

Fecha

Junio 20, 1949

Fotos / Sonidos

Observ.

zealouswizard

Fecha

Diciembre 3, 2020 a las 06:41 TARDE EST

Fotos / Sonidos

Observ.

dbeadle

Fecha

Agosto 20, 2019 a las 03:00 TARDE EDT

Descripción

Protenor belfragei (Broad-headed Bugs). Photographed at Minesing Swamp, Simcoe County, Ontario on 20 August 2019.

Fotos / Sonidos

Qué

Grulla Gris (Antigone canadensis)

Observ.

chrisevans

Fecha

Abril 5, 2019 a las 04:51 TARDE EDT

Fotos / Sonidos

Qué

Carrizo (Phragmites australis)

Observ.

douggoldman

Fecha

Septiembre 16, 2019 a las 03:41 TARDE EDT

Descripción

Both subsp. americanus (native to North America) and subsp. australis (introduced to North America) are found at this site, sometimes growing intermixed. In the photos the former is indicated with an “N” and the latter with an “I”. On the date I visited this site, 16 September 2019, these are the differences I observed with living stems between the two subspecies:

•Relative stem height: subsp. americanus usually shorter, subsp. australis usually taller.
•Relative stem spacing: subsp. americanus usually more dispersed, subsp. australis usually denser (rarely solitary).
•Stem breaking: subsp. americanus fibrous and hard to break off, subsp. australis often breaks off easily.
•Stem color (lower/older internodes): subsp. americanus red and often shiny, subsp. australis yellow-green and not shiny.
•Stem texture (lower/older internodes): subsp. americanus smooth, subsp. australis minutely ridged.
•Stem & leaf sheath dots: subsp. americanus often present, subsp. australis absent.
•Leaf condition: subsp. americanus has lots of senescence, subsp. australis generally are healthy.
•Margins of upper leaves near panicle: subsp. americanus finely serrated, subsp. australis coarsely serrated.
•Sterile stems more abundant than fertile: subsp. americanus yes, subsp. australis no.
•Panicle branches for panicles of similar length: subsp. americanus fewer, subsp. australis more.
•Panicle branch spacing: subsp. americanus farther, subsp. australis closer.
•Flowering status: subsp. americanus finished flowering, subsp. australis flowering.

There probably are other characteristics I overlooked that distinguish these two subspecies from each other. Perhaps these characteristics listed above hold up at other sites in North America. I don’t use leaf color to tell them apart because although some clones of subsp. australis are strongly blue-green, some clones of that subspecies are more green or yellow-green. See this observation for an illustration: https://www.inaturalist.org/observations/30610594

Observation of P. australis subsp. americanus from this location: https://www.inaturalist.org/observations/32878566

Observation of P. australis subsp. australis from this location: https://www.inaturalist.org/observations/32888630

Fotos / Sonidos

Observ.

easleybirding

Fecha

Junio 15, 2017

Descripción

I'm thinking this could be a moth that happens to look like a wasp - but not sure???

Fotos / Sonidos

Qué

Planeadora de Alforjas Negras (Tramea lacerata)

Observ.

ericisley

Fecha

Julio 15, 2016 a las 10:48 MAÑANA CDT

Fotos / Sonidos

Qué

Rayadora Ambarina Pigmea (Perithemis tenera)

Observ.

ricknirschl

Fecha

Septiembre 13, 2019 a las 01:43 TARDE EDT

Fotos / Sonidos

Qué

Zurcidora Migratoria Común (Anax junius)

Observ.

janabuggs

Fecha

Noviembre 3, 2019 a las 03:04 TARDE EST

Fotos / Sonidos

Qué

Bobo Norteño (Morus bassanus)

Observ.

boatbirder

Fecha

Junio 20, 2018 a las 02:48 TARDE BST

Fotos / Sonidos

Qué

Mielero Chillón (Manorina melanocephala)

Observ.

sea-kangaroo

Fecha

Mayo 31, 2018 a las 10:39 MAÑANA AEST

Descripción

mm sweet orangeade

Fotos / Sonidos

Qué

Colimbo Común (Gavia immer)

Observ.

ronskelley

Fecha

Julio 17, 2015

Descripción

Access Bay Loon with 2 chicks

Fotos / Sonidos

Qué

Búho Cornudo (Bubo virginianus)

Observ.

kelly38

Fecha

Marzo 4, 2013

Fotos / Sonidos

Qué

Cormorán Orejón (Nannopterum auritum)

Observ.

jemredwood

Fecha

Noviembre 27, 2018 a las 01:06 TARDE EST

Fotos / Sonidos

Qué

Ganso Canadiense Mayor (Branta canadensis)

Observ.

wdvanhem

Fecha

Mayo 25, 2008 a las 06:38 TARDE EDT

Descripción

Leucistic form