Field Journal 2: ID and Flight Physiology

I went out with Allan's field trip group Saturday morning, leaving at around 9:05 am. It was sunny and partly cloudy, with a 5-10 mph NW wind and a temperature of 21 degrees Fahrenheit. When we returned at 10:38 am, the sky had become fully cloudy and the temperature had raised to 23 degrees. We walked through Athletic campus, Redstone, and down South Prospect St. This was a mostly urban/suburban area, with a few more wooded areas around Redstone. One particular area was the Redstone Woods, just across from the church. This is area is made up of mostly Eastern White Pines and we saw a few birds here. Going down S. Prospect St. there more scattered trees, mostly deciduous but also some pines and spruces.

At one point in this excursion, while in front of the Southwick music building on Redstone campus, a group of maybe three or four Ring-billed gulls flew over us, coming from the direction of the water. I know that gulls have high aspect ratio wings, which are good for endurance and gliding, which fits their lifestyle. If they're going to be living most of their lives over water, it's important to be able to glide and dive easily, although personally I can't think of a time when I've seen a gull actually diving for fish. Most of the time its just trash.

Compare this to American Crows, which have low aspect ratio wings that are better for breaking and maneuvering. Crows may often have to swoop down to grab prey and these wings would be best for that. I also noticed that when crows are flying, they don't seem to glide at all, they just flap their wings over and over again. My guess is that this style of flying is more going faster over shorter distances by using more energy and gliding less.

Publicado por emma2forsythe emma2forsythe, 22 de fevereiro de 2021, 11:02 TARDE

Observações

Fotos / Sons

Nenhuma foto ou som

Qual

Corvo-Americano Corvus brachyrhynchos

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

Seen in a tree on UVM Athletic Campus, making a clicking sound, maybe clicking its beak?

Fotos / Sons

Nenhuma foto ou som

Qual

Pica-Pau-Felpudo Dryobates pubescens

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

three birds, two were flitting around lower branches, the third was sitting very very still on the lowest branch of a crabapple tree. It seemed like it wasn't even breathing, probably out of fear.

Fotos / Sons

Nenhuma foto ou som

Qual

Corvo Corvus corax

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

Two ravens flying overhead.

Fotos / Sons

Square

Qual

Pica-Pau-Grande Dryocopus pileatus

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

High up in a white pine in a stand. Chipping away at the trunk.

Fotos / Sons

Square

Qual

Tordo-Americano Turdus migratorius

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

at least 20 sitting on the grass.

Fotos / Sons

Nenhuma foto ou som

Qual

Gaivota-de-Bico-Riscado Larus delawarensis

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

four birds flying overhead.

Fotos / Sons

Nenhuma foto ou som

Qual

Gaio-Azul Cyanocitta cristata

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

sitting on a transformer box on a telephone line.

Fotos / Sons

Nenhuma foto ou som

Qual

Pardal-Dos-Telhados Passer domesticus

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

at least six individuals flying between bushes.

Fotos / Sons

Nenhuma foto ou som

Qual

Pintassilgo-Americano Spinus tristis

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

flitting between lower branches of a maple tree.

Fotos / Sons

Nenhuma foto ou som

Qual

Pintarroxo-de-Queixo-Preto Acanthis flammea

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

flitting between lower branches of a maple tree.

Fotos / Sons

Nenhuma foto ou som

Qual

Trepadeira-Azul-Do-Canadá Sitta canadensis

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

in an old maple tree.

Fotos / Sons

Nenhuma foto ou som

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

In an old maple tree.

Fotos / Sons

Nenhuma foto ou som

Qual

Chapim-de-Cabeça-Preta Poecile atricapillus

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

flitting between two rhododendron bushes.

Fotos / Sons

Square

Qual

Cardeal Cardinalis cardinalis

Observador

emma2forsythe

Data

Fevereiro 20, 2021

Lugar

UVM Campus (Google, OSM)

Descrição

A male and female in a bush, maybe courting?

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