Posts Tagged ‘Grand Teton National Park’

Moose Cow and Calf, Ditch Creek, GTNP

One of the grand experiences of visiting the Yellowstone and Grand Teton National Parks during the spring is the presence of baby animals.  Nothing gathers a crowd more quickly than the sighting of a Sow Bear and Cubs or a Cow Moose with a Calf.

As I’ve written previously, your best chances for observing Moose are near to, or in water.  These animals certainly must travel significant distances from one watering hole to the next, but doing so must involve the most stealthy tactics, since we rarely see them far from a stream or lake.  Park biologists estimate that there are approximately 1700 Moose in Jackson Hole, so your chances for seeing the largest specimen of the deer family are excellent.  A few words of caution…  Moose are not particularly aggressive animals, yet they can be provoked to attack even inadvertently,  e.g., especially a Cow with Calf.  These large animals can trot along at 20 mph, and can make 35 mph over shorter distances, so it is wise to restrict your approach to not less than 50 yards.  It is rather well understood that the placement of the eyes on the sides of their heads makes it difficult for Moose to see directly in front.  It is unclear whether this fact might aid in developing a defensive strategy, but it is perhaps something to keep in mind.  For more information about the biology of Alces alces shirasi Nelson, I can recommend the following links:

Mooseworld: http://www.mooseworld.com/

National Geographic:  http://animals.nationalgeographic.com/animals/mammals/moose/

Park Service:  http://www.nps.gov/yell/naturescience/moose.htm

Wikipedia Entry:  http://en.wikipedia.org/wiki/Moose

We found this Cow Moose and her Calf, probably just a few days old, in a brushy flat just north of Ditch Creek, along Antelope Flats Road.  Approximate coordinates were 43°39’49.32″ N, 110°37’57.35″ W.   A link to the Google Maps image of the area may be found here.

Images in this entry were recorded on June 3, 2011, at around 09:00 MDT, using the Nikon D7000 and the AF-S NIKKOR 600mm f/4G ED VR.  Exposures were f/5.6 and 1/800s, ISO 640.  This was a rather severely backlit scene, yet the D7000 metering was perfectly accurate.

Copyright 2011 Peter F. Flynn. No usage permitted without prior written consent. All rights reserved.

Brown-Headed Cowbirds in GTNP

Brown-Headed Cowbirds propagate by a most remarkable mechanism.  These birds practice brood parasitism, e.g., female Cowbirds lay their eggs in the nests of other birds.  Brood parasitism within a particular species is apparently common, e.g., a female bird which has lost its nest may lay its egg in the nest of the same species (Sibley).  In the more extreme example of brood parasitism, of which the Cowbird is an accepted style-type, birds of a parasitic species never build their own nest, but exclusively place their eggs in the nests of other birds.

Cowbirds derive their name from their tendency to follow herds of Bison or cattle.  A significant portion of the bird diet  is based on the insects that are flushed into the air by herds of grazing Bison or cattle – such herds are constantly moving in search of fresh grasses.  Thus brood parasitism in this species is believed to be the solution to the problem of being constantly on the move, and the consequent inability to maintain (their own) stable nests.

We found these birds in the Willow Flats Overlook parking area, Grand Teton National Park.  Images of the male (upper) and female (lower) Brown-Headed Cowbirds were recorded at 16:00 MDT on June 4, 2011, using the Nikon D3s and the AF-S VR Zoom-NIKKOR 200-400mm f/4G IF-ED at 400mm. Exposures were at f/7.1 and 1/500s, ISO 1250.  Image processing was accomplished using Photoshop CS5 with Nik and PhotoKit Sharpener plugins.

Special thanks to Dr. Jack Skalicky for his identification of these Cowbirds and an introduction to their biology.

Additional information can be found in the excellent text entitled ‘The Sibley Guide to Bird Behavior’, D.A. Sibley (2001) and at the Smithsonian National Zoological Park website.

Copyright 2011 Peter F. Flynn. No usage permitted without prior written consent. All rights reserved.

GTNP 137 and Her Cubs

GTNP 137 is a Black Bear, Ursus americanus, living in the heavily forested part of the vast central area of Grand Teton National Park (GTNP) that lies between Jenny Lake to the west, and the Bridger-Teton National Forest to the East.  GTNP 137 is the tag this sow Black Bear wears on its right ear.  The tag on the left ear ends in 38, but I cannot get a clear view of any other letters/numbers, if there are any.

With this sow are two healthy yearling cubs.  Black Bear cubs only need to stay in the general vicinity of their mother, since when threatened they exhibit the most extraordinary defensive climbing skills.  Black Bear cubs seem to literally fly up trees, stopping at ~15 feet to evaluate danger before climbing higher or descending.  This behavior is quite distinct from that of Grizzly Bear cubs, which tumble along close behind their mother as they travel across relatively open meadows and plains.

Park biologists estimate that there are between 100 and 150 Black Bear in GTNP.  Since Black Bears favor densely forested areas pretty much exclusively, it is uncommon to see these animals whilst traveling along the Jackson Hole Highway, but we were at the right place at the right time (near Deadman’s Bar Road).  We work hard at getting lucky.

Seeing Black Bear, or just about any animal for that matter, takes a fair bit of determination.  Ask rangers for advice about where animals have recently been seen – and by that I mean, ask *all* the rangers you run into, since information about animal sightings tends to move slowly within the ranger network.  The folks that work at the main entrances tend to be a little out of the loop.  People you find at one animal sighting tend to be amongst the best sources of information – just ask what they’ve seen, where, when, etc – folks are generally very enthusiastic about sharing information.  Even if the information is a few hours old, it can be very valuable, since certain species, e.g., Bear and Moose, tend to hang around a particular site for several hours or even days.

Images in this entry were recorded between 08:00 and 09:00 on June 4, 2011, using the Nikon D3s, and the AF-S VR Zoom-NIKKOR 200-400mm f/4G IF-ED at mostly 400mm.  Exposures were at f5.6 and 1/800s, ISO 2500.  Image processing was accomplished using Photoshop CS5 with Nik and PhotoKit Sharpener plugins.

Copyright 2011 Peter F. Flynn. No usage permitted without prior written consent.  All rights reserved.