Fotos / Sonidos

Autor

jimmoore

Fecha

Mayo 25, 2020 a las 02:07 PM EDT

Descripción

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

Fotos / Sonidos

Autor

vvoelker

Fecha

Abril 2019

Fotos / Sonidos

Qué

Marmota de Vancouver (Marmota vancouverensis)

Fecha

Junio 25, 2015 a las 06:48 AM PDT

Descripción

This is "Alan", the day after he was first discovered. Unbelievable wanderer, hundreds of km from nearest mountain population. He stayed here at the Bamfield Marine Sciences on the seacoast for days, allowing people to walk right past him. He was trapped by the Marmot Recovery Foundation on 27 June and taken to a population on a mountain, where he lived for several years. See below for a comment about this. The last photo shows one student's interpretation of why he came to the west coast. He also set up a Twitter account: https://twitter.com/BamfieldMarmot.

Fotos / Sonidos

Qué

Zambullidor Pico Grueso (Podilymbus podiceps)

Autor

willemspan

Fecha

Marzo 30, 2021 a las 10:51 AM EDT

Fotos / Sonidos

Autor

hoaryherper

Fecha

Junio 20, 1949

Fotos / Sonidos

Fecha

Diciembre 3, 2020 a las 06:41 PM EST

Fotos / Sonidos

Autor

dbeadle

Fecha

Agosto 20, 2019 a las 03:00 PM 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)

Autor

chrisevans

Fecha

Abril 5, 2019 a las 04:51 PM EDT

Fotos / Sonidos

Qué

Carrizo (Phragmites australis)

Autor

douggoldman

Fecha

Septiembre 16, 2019 a las 03:41 PM 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

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)

Autor

ericisley

Fecha

Julio 15, 2016 a las 10:48 AM CDT

Fotos / Sonidos

Qué

Rayadora Ambarina Pigmea (Perithemis tenera)

Autor

ricknirschl

Fecha

Septiembre 13, 2019 a las 01:43 PM EDT

Fotos / Sonidos

Qué

Zurcidora Migratoria Común (Anax junius)

Autor

janabuggs

Fecha

Noviembre 3, 2019 a las 03:04 PM EST

Fotos / Sonidos

Qué

Bobo Norteño (Morus bassanus)

Autor

boatbirder

Fecha

Junio 20, 2018 a las 02:48 PM BST

Fotos / Sonidos

Qué

Mielero Chillón (Manorina melanocephala)

Autor

sea-kangaroo

Fecha

Mayo 31, 2018 a las 10:39 AM AEST

Descripción

mm sweet orangeade

Fotos / Sonidos

Qué

Colimbo Común (Gavia immer)

Autor

ronskelley

Fecha

Julio 17, 2015

Descripción

Access Bay Loon with 2 chicks

Fotos / Sonidos

Qué

Búho Cornudo (Bubo virginianus)

Autor

kelly38

Fecha

Marzo 4, 2013

Fotos / Sonidos

Qué

Cormorán Orejón (Nannopterum auritum)

Autor

jemredwood

Fecha

Noviembre 27, 2018 a las 01:06 PM EST

Fotos / Sonidos

Qué

Ganso Canadiense Mayor (Branta canadensis)

Autor

wdvanhem

Fecha

Mayo 25, 2008 a las 06:38 PM EDT

Descripción

Leucistic form