Markus Gronwald

@MarkusGronwald

I am interested in the behaviour of invasive species. My focus lies on Polynesian rats on islands. I enjoy every moment in the field watching birds.

Auckland, New Zealand
sbs.auckland.ac.nz/people/profile…
Geregistreerd in april 2016
43 foto's en video's Foto's en video's

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  1. 28 jun.

    We are prepared for the eradication of the Polynesian rat from a motu in . Research over the last months has provided us with good data. I am excited to see how the island will change after that.

    2 antwoorden 9 retweets 28 vind-ik-leuks
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  2. 25 mei

    After hermit crabs have messed up our cheap cage traps we brought solid metal traps. Coconut crabs saw this as a challenge...impressive power.

    1 retweet 8 vind-ik-leuks
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  3. 18 mei

    What can be better than a day in the field? - A night in the field. Crawling on the forest floor can be "fun". Interesting things every few centimetres.

    1 retweet 4 vind-ik-leuks
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  4. 8 mei

    Maybe Auckland and other cities can learn from that. I think it is a good step forward. Enforcement will be the key.

    Palmerston North is poised to become the first New Zealand city to make desexing cats mandatory:
    1 antwoord 1 retweet 2 vind-ik-leuks
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  5. 6 mei

    Ship rats did not make it to this motu. Some are left, but are limited to a few species. Kiore are abundant. I am looking forward to learning from the eradication and the change afterwards. Another wonderful day in the field.

    5 vind-ik-leuks
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  6. 4 mei

    Getting ready for field work in . They want to get rid of invasive rats to protect their . I am happy to be involved in great research and the planned eradication. It will help us on our way to a .

    8 vind-ik-leuks
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  7. 28 apr.

    It is great to see that more and more communities want to get rid of rats. Good research provides valuable information needed to be successful. is a positive example where ambitious members of the community have started the process.

    3 retweets 9 vind-ik-leuks
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  8. heeft geretweet
    23 apr.

    Tonight at Mt Heale hut, Aotea Great Barrier, a very special guest dropped in. A rare black petrel / taiko !

    2 retweets 8 vind-ik-leuks
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  9. 14 apr.

    Just spent a few days in the . in pays out. Kaka, Robin, Whitehead, Tomtit, Kakariki, rifleman, fernbird and many more are abundant and you can see them. There is even a good chance to hear .

    1 antwoord 1 retweet 6 vind-ik-leuks
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  10. 23 feb.

    I caught a conversation on cam (Germans): A: "The sign says 'human trap'" B: "I feel a little afraid now"

    1 retweet 1 vind-ik-leuk
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  11. 23 feb.

    That's an actual photo of me at the end of each day after watching hundreds of videos of rats not getting killed in a trap.

    1 antwoord 2 vind-ik-leuks
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  12. 14 feb.

    It seems a bit crazy that these fundamental things have to be written down again. In Defense of Biodiversity: Why Protecting Species from Extinction Matters via

    1 retweet 1 vind-ik-leuk
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  13. 16 jan.

    A biodiversity forecast on TV. I like the idea. Read this great interview.

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  14. heeft geretweet
    8 jan.

    A brief summary of ethical responsibilities in invasion biology. . Which of these has more rights?

    , , en 3 anderen
    2 antwoorden 19 retweets 25 vind-ik-leuks
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  15. 4 jan.

    How about helping your nearest community working as a in ? Highly recommended!

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  16. heeft geretweet
    20 dec. 2017

    After a single night of feeding, 21% of hedgehog stomachs contained the remains of native skinks, while a single hedgehog dropping contained 10 skink feet, and a single hedgehog had 283 wētā legs in its stomach!

    10 antwoorden 51 retweets 33 vind-ik-leuks
    Deze collectie tonen
    Deze collectie tonen
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  17. 18 dec. 2017

    When you usually work with in low population density and then you go to the tropics and are covered in rats. I have seen more in one day than in the last two years in NZ.

    1 antwoord 1 retweet 6 vind-ik-leuks
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  18. 13 dec. 2017

    Ground nesting birds are especially vulnerable to invasive predators. Not only NZ is suffering. In islands with rats in high population densities don't have many birds left. No time to wait for the last one to disappear.

    3 vind-ik-leuks
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  19. heeft geretweet
    7 dec. 2017

    Anti-#1080 threats are part of a growing rural-urban divide, warns Dave Hansford.

    3 retweets 1 vind-ik-leuk
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  20. 9 dec. 2017

    Coconut crabs (Birgus latro) are quite impressive. Colorful, strong, huge. In small juveniles are found more often on the rat free motu . A successful rat eradication on the other motus might change that.

    1 antwoord 1 retweet 2 vind-ik-leuks
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