February, 2019 Wildlife Report

During the month of February, 2019 the Mercer County Wildlife Center accepted the following 43 new patients for rehabilitation.    

7  Common raccoon

4  Big brown bat

3  Northern cardinal

2  Ring-billed gull

2  Red-tailed hawk

2  Mourning dove

2  Northern flicker

2  Woodchuck

2  Virginia opossum

2  American crow

1  American robin

1  House sparrow

1  Red-bellied woodpecker

1  Common grackle

1  Wild turkey

1  Fish crow

1  Northern saw-whet owl

1  Hooded merganser

1  White-throated sparrow

1  Eastern screech-owl

1  Cooper's hawk

1  Great horned owl

1  White-footed mouse

1  Red fox

1  Eastern box turtle

January 2019 Wildlife Report

During the month of January, 2019 the Mercer County Wildlife Center accepted the following 36 new patients for rehabilitation.    

4  Mourning dove

4  Silver-haired bat

3  Red-tailed hawk

3  Common raccoon

2  Cooper's hawk

2  Dark-eyed junco

2  Great blue heron

2  White-throated sparrow

2  Big brown bat

1  White-breasted nuthatch

1  Herring gull

1  Belted kingfisher

1  European starling

1  House sparrow

1  Eastern screech owl

1  Northern cardinal

1  Eastern gray squirrel

1  White-tailed deer

1  Eastern cottontail

1  Virginia opossum

1  Diamondback terrapin

December 2018 Wildlife Report

During the month of December, 2018 the Mercer County Wildlife Center accepted the following 49 animals for rehabilitation.  During 2018 the Mercer County Wildlife Center accepted a total of 2608 new patients for rehabilitation.   

4  Eastern gray squirrel

3  Canada goose

3  Northern flying squirrel

3  Virginia opossum

2  House sparrow

2  Herring gull

2  Red-bellied woodpecker

2  Northern saw-whet owl

2  Cooper's hawk

2  Big brown bat

2  Eastern cottontail

2  Common raccoon

2  Silver-haired bat

2  Common garter snake

1  Great black-backed gull

1  Rock dove

1  Lesser scaup

1  European starling

1  Turkey vulture

1  Red-tailed hawk

1  Mourning dove

1  Savannah sparrow

1  Eastern bluebird

1  Eastern screech owl

1  Northern cardinal

1  Eastern red bat

1  American beaver

1  Diamondback terrapin

1  Eastern box turtle

1  Snapping turtle 

August - November, 2018 Wildlife Report

During the months of August, September, October, and November the Mercer County Wildlife Center accepted the following 764 animals for rehabilitation:

209  Eastern gray squirrel

111  Eastern cottontail

  36  Eastern box turtle

  33  House sparrow

  30  Mourning dove

  29  Common raccoon

  18  Rock dove

  15  Gray catbird

  15  White-footed mouse

  15  Common map turtle

  13  Blue jay

  12  Red-tailed hawk

  11  American robin

  11  House finch

  11  American goldfinch

  11  Eastern painted turtle

  10  Virginia opossum

  10  Yellow-bellied slider

    9  American crow

    9  Big brown bat

    8  Red fox

    8  Woodchuck

    8  Striped skunk

    7  Canada goose

    7  Cooper's hawk

    7  Northern cardinal

    7  White-tailed deer

    6  Fish crow

    4  Great horned owl

    4  Chimney swift

    4  Bald eagle

    4  Ruby-throated hummingbird

    8  Snapping turtle

    3  Great blue heron

    3  American kestrel

    3  Herring gull

    2  Great black-backed gull

    2  Double-crested cormorant

    2  Peregrine falcon

    2  Chipping sparrow

    2  Barn swallow

    2  Northern saw-whet owl

    2  Broad-winged hawk

    2  House wren

    2  Eastern screech-owl

    2  Eastern red bat

    2  Northern flying squirrel

    2  Red-bellied turtle

    2  Common garter snake

    1  Common yellowthroat

    1  Green frog

    1  Hermit thrush

    1  Pileated woodpecker

    1  European starling

    1  Northern mockingbird

    1  Turkey vulture

    1  Virginia rail

    1  Ring-billed gull

    1  Song sparrow

    1  Tufted titmouse

    1  Dark-eyed junco

    1  White-breasted nuthatch

    1  Yellow-billed cuckoo

    1  Black vulture

    1  Cape May warbler

    1  Northern bobwhite

    1  Red-shouldered hawk

    1  Wood thrush

    1  Brown creeper

    1  Downy woodpecker

    1  Great egret

    1  Common raven

    1  Silver-haired bat

    1  Norway rat

    1  Meadow vole

    1  Common musk turtle

    1  Diamondback terrapin

    1  Northern long-eared bat

June 2018 Wildlife Report

In June the Mercer County Wildlife Center accepted the following 517 animals for


60  Eastern cottontail

42  Common raccoon

35  American robin

37  Snapping turtle

32  Mallard

29  White-tailed deer

24  European starling

19  Blue jay

19  House sparrow

19  Virginia opossum             

17  Common grackle

16  House wren

16  Eastern box turtle

11  White-footed mouse

10  Mourning dove

  9  Eastern gray squirrel

  9  Eastern painted turtle

  8  Common map turtle

  7  American crow

  7  Gray catbird

  6  Eastern bluebird

  6  Big brown bat

  6  Eastern phoebe

  6  Barn swallow

  6  Eastern chipmunk

  5  Canada goose

  4  Red-tailed hawk

  4  Northern cardinal

  4  Red-bellied woodpecker

  3  Downy woodpecker

  3  Woodchuck

  3  Northern flicker

  3  Brown-headed cowbird

  3  Striped skunk

  3  Northern copperhead

  3  Red-bellied turtle

  2  House finch

  2  Red fox

  2  Fish crow

  2  Northern mockingbird

  1  Brown creeper

  1  Northern oriole

  1 Turkey vulture

  1  Belted kingfisher

  1  Great black-backed gull

  1  Wood duck

  1  Black vulture

  1  Black-billed cuckoo

  1  Eastern kingbird

  1  Ruby-throated hummingbird

  1  Black-crowned night heron

  1  Great horned owl

  1  Tree swallow

  1  Peregrine falcon

  1  Purple martin

  1  Black-capped chickadee

  1  Chipping sparrow

  1  Red squirrel

  1  Eastern ratsnake

May 2018, Wildlife Report

In May the Mercer County Wildlife Center accepted the following 461 animals for


71  Eastern cottontail

53  Virginia opossum

44  Common raccoon

31  Canada goose

27  European starling

24  American robin

23  White-tailed deer

23  Mallard

20  House sparrow

16  Eastern gray squirrel

12  Eastern box turtle

 9  White-footed mouse

 8  Northern copperhead

 7  Common grackle

 7  Blue jay

 7  Red fox

 6  Common merganser

 6  Mourning dove

 6  Woodchuck

 5  Eastern screech-owl

 5  House wren

 4  Gray catbird

 4  Black-capped chickadee

 4  Striped skunk

 3  Black vulture

 3  White-breasted nuthatch

 3  House finch

 3  Wood duck

 3  Northern flying squirrel

 3  Eastern chipmunk

 3  Eastern painted turtle

 2  Great horned owl

 2  Turkey vulture

 2  Northern cardinal

 1  American crow

 1  Brown-headed cowbird

 1  Tufted titmouse

 1  Barn swallow

 1  Horned grebe

 1  Red-tailed hawk

April 2018, Wildlife Report

April, 2018 Wildlife Report

In April the Mercer County Wildlife Center accepted the following 181 animals for rehabilitation:

60  Eastern cottontail

47  Eastern gray squirrel

10  Virginia opossum

  5  Canada goose

  4  Mallard

  4  Mourning dove

  4  Red fox

  3  Tree swallow

  3  Red-tailed hawk

  3  Common raccoon

  2  Great horned owl

  2  Rock dove

  2  White-footed mouse

  1  Black vulture

  1  Cooper's hawk

  1  Eastern screech-owl

  1  American crow

  1  Herring gull

  1  Yellow-bellied sapsucker

  1  Common grackle

  1  Cedar waxwing

  1  American robin

  1  American woodcock

  1  Turkey vulture

  1  Horned grebe

  1  Big brown bat

  1  Eastern milk snake

  1  Common musk turtle

  1  Eastern box turtle  


Animal Ambassadors used in educational programming:


Big brown bats

Red tailed hawk

Northern saw whet owl

Eastern screech owl

American kestrel

Striped skunk

Virginia opossum

"Getting to know your local wildlife..."


Opossums have a prehensile (adapted for grasping – not hanging) tail and an opposable (capable of being placed opposite) thumb and big toe, both unique among our native mammals.  Their young are born only 13 days after fertilization, crawl into the mother's pouch where they latch onto nipples, and continue their development for another two months.  They have 50 teeth, more than twice the number of most other mammals.

When an opossum is in danger, it will first hiss and growl, lunge at a predator, and then try to escape by running or climbing a tree.  In those few cases where it is trapped, the opossum instinctively falls down on its side with its mouth slightly open; it may also drool, defecate, and give off a bad smell, making itself very unattractive to a predator.  This state may last a few minutes or several hours, but the opossum seems to snap out of it as rapidly as it fell into it.  Since the action is an instinctive response, the opossum is not consciously controlling it.   So it is not "playing possum."

The opossum is grayish in the north and black in the south. It is 15 to 20 inches long, excluding tail, and weighs from 4 to 14 pounds.  Opossums are active at night (nocturnal).  During the day they sleep in dens or other protected spots.  They are nomadic and  tend to shift dens frequently.  Seventy-five percent of the time they use a den for only one night before moving on, though there are times when the opossum may use the same den for 20 to 30 days.  Opossums may even share dens with other animals such as rabbits, skunks, and woodchucks.

Male opossums are aggressive toward other males but not toward females.     Non-estrous females are generally aggressive toward estrous (in heat) females.  During mating the male bites the fur on the female's neck and then climbs onto her back. At this point both topple over to the right, and copulation takes place.  It has been found that they almost always fall to the right.  If for some reason they fall to the left or remain standing, copulation is less likely to be successful.  Gestation of the young lasts only 12 to 13 days, at which point each baby is about   ½ inch long and weights the merest fraction of an ounce.  There is an average of 6 to 10 young in a litter.  In about 2 weeks they are weaned, and in another 3 to 4 weeks they are independent.

Help Us Save Wild...To Donate Please Click Below:

Wildlife Center Friends, Inc., PO Box 161, 1748 River Road, Titusville, NJ 08560

Mercer County Wildlife Center


Location:  Rt. 29; 3.2 miles north of the Titusville Fire Station

January 2018 Wildlife Report

January, 2018 Wildlife Report

In January the Mercer County Wildlife Center accepted the following 46 animals for rehabilitation.  For the calendar year 2017 the Wildlife Center accepted 2,451 animals for rehabilitation.  Included were 349 Eastern cottontail, 344 Eastern gray squirrel, and 156 common raccoon.

6  Canada goose

5  Mourning dove

4  Big brown bat

4  Common raccoon

3  Virginia opossum

2  Great blue heron

2  Cooper's hawk

2  Eastern cottontail

2  Eastern box turtle

1  Eastern screech owl

1  Herring gull

1  Dark-eyed junco

1  Northern flicker

1  Red-shouldered hawk

1  Blue jay

1  House finch

1  Mallard

1  American robin

1  Turkey vulture

1  Red-tailed hawk

1  Northern cardinal

1  Snowy owl

1  White-footed mouse

1  Bobcat

1  Common garter snake

Education Ambassadors:

Eastern screech owl

Red-tailed hawk

Great horned owl

Barn owl

Striped skunk

Big brown bat

Northern saw whet owl

Barred owl


"Getting to know your local wildlife..."


Canada geese are generally migratory, moving in conspicuous lines or V-shaped formations high in the air as they travel south in fall and north in spring.  Over the last twenty years this pattern has changed slightly due to wildlife management practices of providing food for the geese throughout the winter.  Now many flocks of geese are remaining in northern areas in winter.

Adult Canada geese go through one complete molt per year.  This occurs in mid-summer and is completed by about mid-August.  The young are still with the adults during the molt, and at this stage none of the family can fly; the young because they have not grown their full primary feathers and the adults because they are molting.  When the male and female are together you can usually tell the male, for he is slightly larger. 

Since there are no differences in their plumage, you must rely primarily on their differences in behavior.  The calls of the two sexes are very distinct.  The male's is low, with two syllables; "ahonk."  The female's is higher, with usually only one syllable; "honk."  Canada geese usually first pair in winter.  Pairs can remain together for as long as both geese live.  The male defends the immediate area around the female; the female closely following the male of her choice.

The nest is on the ground at the edge of open water or on small hummocks.  The outside diameter is 16 to 20 inches.  It is made of cattail leaves, grasses, and lining of feathers.  The first egg may be laid within an hour after the completion of the nest.  The remaining eggs are laid one per day until the clutch is complete.  The average number of eggs is 5.  Young geese are ready to leave the nest almost as soon as they hatch.

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Mercer County Wildlife Center