Indian Myna
Environmental selection pressures
About
Breeding
Habitat
Abiotic
Biotic
Threats
Consequences
Ecosystem
Diet
Behaviour
predation
competition
disease
symbiosis
Human
Farming
Population (changes)
Distribution
Niche
Introduction
Purpose
Climate
Food access
Human impact
trapping
Food
Predation
Shelter/nesting
Other organisms
Origin
Native to Asia
Open woodlands India
pre-adapted (behavioural)
tall vertical structures, no tree coverage
1968-1971 study: 110 released
1991 = 15 birds/km2
1994 = 75 birds/km2
cities and urban
2019 = 250 birds/km2
east Australia
urban areas
city scapes
populated
aggressive
intelligent
Nesting
pair for life
4-6 eggs/brood
August/October-March
avian
omnivore
scavenger
flight bladder
feathers
wings
beak
usurp native birds from nests
kill other birds/young
fight over food sources
territorial
no fear -
attack humans and larger animals
if threatened
chase possums from nests
suspicious
open bins
sedentary
monogamous
90,000+ as of 2006
AUSTRALIA
garbage/waste/scraps
backyard
pet food
compost
Urban areas
Dry sclerophyll forests
deforested/clear
Purpose
IN THE PEST SOCIETY
competes with native birds for
food
nesting
no native predators
feral cats
feral dogs
chicks - other birds
seeds
droppings disperse
human waste
Urban areas
dry sclerophyll forests
dense, wet ferny floors
trees dense or dispersed
east coast (NSW, QLD, VIC)
shared with
possums
gliders
larger marsupials
1000mm rainfall/year
temperate conditions
winter and summer months (inc. autumn, spring)
birds get larger due to abundance of food
no natural predators
feral cats
disease/illness
humans = trapping
no competition from other species
backyards
dog and cat food
bugs
beetles
grubs
worms
roaches
seeds/grains
garbage scraps
fruits and veggies
population boom
1862 introduced to control insects in Melbourne markets
temperate conditions
warm-hot summers
mild winters
evict other animals
roofs
trees
taken to North QLD to combat cane beetles impacting sugar cane
external factors that affect organism's ability to survive in particular environment
DARWINS FINCHES EXAMPLE
beak sizes
drought = small seeds scarce, big seeds abundant, larger beaks (mm) needed for bigger seeds
El Nino - 10% more rain = vines -
small seeds abundant, large seeds scarce
smaller beaks for smaller seeds
avian malaria
nothing natural
humans - trapping
parasites
Ornithonyssus bursia mite - dermatitis in humans
spread agricultural weeds
pesticides
illness in birds
native species
Parrots
regents
coxens
turquoise
double-eyed fig
glossy black cockatoo
hooded plover
flesh-footed shearwater
Terns
sooty
white
little
possums
gliders