Hi All,
One thing to remember when using any of the anti-coagulant
rodenticides is to ensure that there is always a supply of water near
the bait stations. As the rodents haemorrhage internally due to the
rodenticide, they become very thirsty and will cover surprising
distance in search of water and so become targets for predators. If
there is water supply they will not stray far from the bait/water
station. An alternative to using dry baits, is to use liquid
formulations of the bait. In most situations water is less available
to rodents than feed, liquid baits give better results and the
rodents are more likely to die near the drinkers containing the
liquid baits.
Cheers,
Carl Clifford
On 09/08/2006, at 11:45 AM, michael norris wrote:
HI Jade and all
I support what Greg said about live trapping - certainly the most
appropriate if there are risks of killing native rodents as well as
the introduced ones. Ian Temby in his great "Wild Neighbours: the
humane approach to living with wildlife" says Swamp Rats and
Grassland Melomys are the native ones most likely to come near houses
in coastal Queensland.
But introduced rodents can be so numerous that trapping may not work.
So, as Ian suggests, why not just try to prevent them being a
nuisance by reducing food availability, netting fruit trees etc.?
If you must use poisons, the message below from Stephen Debus was
posted on 22 January this year.
It checks out with expert advice I had a few years back about
controlling rats near bushland and rakali habitat, but note that
warfarin may not work in some areas because pest rats have evolved
resistance to the stuff.
Michael Norris
The answer to this one would depend on what bait is used on the
rabbits or other pests. There isn't much risk of secondary
poisoning to raptors if they eat a rabbit baited with 1080, but I
think pindone (rabbit bait) carries a higher risk of secondary
poisoning. Same with some of the rodent poisons-- the older, multi-
feed ones like warfarin ('Ratsak') and coumatetralyl ('Racumin')
are much less risk to raptors and owls that eat mice than the
newer, single-dose rodenticides like brodifacoum ('Talon',
'Klerat') are. 'Talon' kills raptors and owls that have eaten
poisoned rodents. There are some other bad ones for raptors too,
in the same family as brodifacoum-- among them I think 'Bromakill'
and others in the 'bro...' or 'brom...' (=bromine, i.e. brominated
anticoagulants) family. I'd have to look it all up to find better
information.
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