EntdeckenInvertebrate

Western Dog Tick

dermacentor similis

The Western Dog Tick (Dermacentor similis) is a highly resilient hard tick species found throughout the western regions of North America. Renowned for its hardiness and parasitic lifestyle, this arachnid plays a significant role in its local ecosystems as a vector for various microorganisms and as a food source for several insectivorous animals. It is particularly well-known for its association with domestic dogs, wild canids, and larger mammals, including humans. Despite their unpopular reputation, these ticks possess remarkable physiological adaptations. They can endure extreme environmental conditions and survive for many months without feeding, waiting patiently in the brush for a suitable host to pass by. Understanding their behavior and life cycle is crucial for hikers, pet owners, and outdoor enthusiasts navigating their shared environments.

Lebensraum: Found in brushy areas, tall grasslands, chaparral, woodland trails, and transition zones between forests and fields where hosts frequently travel.

Aussehen

Adult Western Dog Ticks are relatively large, flat, oval-shaped arachnids, measuring about 3 to 5 mm in length when unfed, but expanding significantly up to 15 mm and turning a bluish-grey color when fully engorged. They exhibit a distinct ornate scutum (dorsal shield) featuring prominent silver-grey or whitish ornate markings on a dark brown background. Males have a fully covered ornate back, while females have a smaller ornate scutum near the front, leaving the rest of their dark brown abdomen exposed to stretch during feeding. Like all arachnids, adults and nymphs have eight legs, while the tiny larvae have only six.

ReichAnimaliaStammArthropodaKlasseArachnidaOrdnungIxodidaFamilieIxodidaeGattungDermacentor
Western Dog Tick
Western Dog Tick

Kategorie

Invertebrate

Seltenheit

Common

Gefahr

1/5 · Sehr gering

Snaps

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Interessante Fakten

A single female Western Dog Tick can lay up to 6,000 eggs in leaf litter before she dies.

They do not jump or fly; instead, they rely entirely on direct physical contact when hosts brush past their questing positions.

They utilize a specialized sensory cavity on their front legs called Haller's organ to detect chemical cues, moisture, and temperature changes.

Besondere Fähigkeiten

Fähigkeit

Questing Behavior

The tick climbs to the tips of grasses and shrubs, extending its front legs to detect the heat, carbon dioxide, and vibrations of passing hosts.

Fähigkeit

Extreme Starvation Tolerance

They can survive for several months, and sometimes over a year, without a single blood meal by drastically lowering their metabolic rate.

Fähigkeit

Anesthetic Saliva

Their saliva contains specialized compounds that numb the host's skin, prevent blood clotting, and suppress the immune response, allowing undetected feeding.

Maße und Details

Länge
1-2 cm
Gewicht
0.000002-0.00015 kg
Lebenserwartung
1-3 Jahre
Gelegegröße
2000-6000
Brutzeit
20-40 Tage

Ernährung und Fütterung

Feeds exclusively on the blood of mammalian hosts to complete its life cycle.

Altersunterschiede: Larvae and nymphs feed on smaller rodents, whereas adults target larger mammals.

Hauptnahrung

  • Mammalian blood
  • Rodent blood
  • Canine blood

Nahrungssuche

  • Ambush

Ökologische Zusammenhänge

parasite

Domestic Dog

Canis lupus familiaris

Adult ticks parasitize dogs for a blood meal.

parasite

Deer Mouse

Peromyscus maniculatus

Larval ticks parasitize deer mice.

eaten by

Western Fence Lizard

Sceloporus occidentalis

Often consumed by western fence lizards as part of their diet.

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Sicherheit

Gefahr

1/5 · Sehr gering

Noch keine besonderen Sicherheitshinweise.

Häufig gestellte Fragen

Wie identifiziert man Western Dog Tick?

Der einfachste Weg, Western Dog Tick zu bestimmen, ist die Verwendung der Naturführer-App Snappit.

Was ist der/die/das länge von Western Dog Tick?

1-2 cm

Was ist der/die/das gewicht von Western Dog Tick?

0.000002-0.00015 kg

Was ist der/die/das lebenserwartung von Western Dog Tick?

1-3 Jahre

Was frisst Western Dog Tick?

Feeds exclusively on the blood of mammalian hosts to complete its life cycle.

Wo findet man Western Dog Tick normalerweise?

Found in brushy areas, tall grasslands, chaparral, woodland trails, and transition zones between forests and fields where hosts frequently travel.

Wie jagt Western Dog Tick?

Ambush

Was ist der/die/das gelegegröße von Western Dog Tick?

2000-6000

Snap-Karte

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Wo zu sehen

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