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Author Topic: False Monitor vs Cooper's Hawk  (Read 51 times)

SquamataOrthoptera

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False Monitor vs Cooper's Hawk
« on: October 23, 2018, 12:16:18 pm »
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.



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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SquamataOrthoptera

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Re: False Monitor vs Cooper's Hawk
« Reply #1 on: October 28, 2018, 10:45:14 am »
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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