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#Post#: 45--------------------------------------------------
False Monitor vs Cooper's Hawk
By: SquamataOrthoptera Date: October 23, 2018, 2:16 pm
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False Monitor-Callopistes Flavipunctatus
Callopistes Flavipunctatus, commonly refered to as the False
Monitor, is a large species of Teiid Lizard. It inhabits
Northern Peru and Southern Ecuador, they are mostly found in dry
forests, and hills. They are ground dwelling Lizards, and often
make large burrows, one of the reasons they make burrows is to
outlast unfavourable climates.
Callopistes Flavipunctatus is a large Teiid lizard, up to 1000mm
in length, and weight in over 800 grams. The tail is two thirds
of the length in these Lizards. The males of these Lizards are
larger with larger heads in comparison to females. These lizards
have a dark coloration. The Lizards often develope large jowels,
similar to Tegus, they are also described as flighty and fast
moving Lizards.
These Lizards have sharp and reccurved teeth, well suited to
grasping large and active prey. Due to their muscular and
expandable stomach, they are belived to have adaptations for
large prey. These Lizards eat a variety of Animals, including
Snakes, other Lizards, small Mammals such as Degus, and Birds.
They have been known to eat Eggs and occasionally eat
vegetation. They generally forage for prey, once spotted they
ambush their prey, generally they kill their prey with one bite
to the neck or a series of bites.
HTML https://c1.staticflickr.com/8/7398/11974385044_e355114e43_b.jpg
Cooper's Hawk-Accipiter cooperii
Cooper's hawk (Accipiter cooperii) is a medium-sized hawk native
to the North American continent and found from Southern Canada
to Northern Mexico. As in many birds of prey, the male is
smaller than the female. The birds found east of the Mississippi
River tend to be larger on average than the birds found to the
west.
The average mass of an adult male ranges from 220 to 440 g (7.8
to 15.5 oz) with a length between 35 and 46 cm (14 and 18 in).
The adult male is significantly smaller than the average female,
which weighs 330 to 700 g (12 to 25 oz) and measures 42 to 50 cm
(17 to 20 in) long. Its wingspan ranges from 62 to 94 cm (24 to
37 in). Individuals living in the eastern regions, where the
sexes average 349 g (12.3 oz) and 566 g (20.0 oz), tend to be
larger and heavier than those in the western regions, where the
respective sexes average 280 g (9.9 oz) and 440 g (16 oz).
These birds capture prey from cover or while flying quickly
through dense vegetation, relying almost totally on surprise.
One study showed that this is a quite dangerous hunting style.
More than 300 Cooper's hawk skeletons were investigated and 23%
revealed healed fractures in the bones of the chest. Cooper's
hawks prey almost exclusively on small to mid-sized birds.
Typical prey species include American robins, other thrushes,
jays, woodpeckers, European starlings, quail, icterids, cuckoos,
pigeons and doves. Birds preyed on can range in size from
wood-warblers to ostriches. They may also prey upon the raptor
American kestrel and other smaller raptors, including their
cousin the sharp-shinned hawk. They have been known to rob nests
and may supplement their diet with small mammals such as
chipmunks, hares, mice, squirrels, and bats. Even more rarely,
they may prey on lizards, frogs, or snakes. It normally catches
its prey with its feet and kills it by repeatedly squeezing it
and holding it away from its body until it dies.
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#Post#: 46--------------------------------------------------
Re: False Monitor vs Cooper's Hawk
By: SquamataOrthoptera Date: October 28, 2018, 12:45 pm
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Anyway, I back the Lizard.
Callopistes Maculatus, despite being much smaller, is avoided as
prey from some of the Colubrids (which can grow up to 2m) they
coexist with. When it comes to birds, they are not usually
preyed upon, and when they are it is generally significantly
less then other Lizards.
In this case, the False Monitor is slightly larger than the
bird, with effective dentation and a fairly sturdy build.
Considering how even its smaller relative is not preyed upon
often, I think it speaks volumes on how dangerous they can be.
With Flavipunctatus, I have never heard of anything eating it at
all. And they are sympatric with a number of carnivorans and
birds.
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