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Terry Lobdell
Member
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Posted: Wed Mar 28th, 2007 12:27 am |
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| Last night I came home from work about 12:30am. I checked my bat houses and had 5 little browns roosting in one house. They were all packed tight together in a row.
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Joe Spencer
Administrator
| Joined: | Mon Feb 11th, 2002 |
| Location: | Massachusetts USA |
| Posts: | 522 |
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Posted: Wed Mar 28th, 2007 02:07 am |
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Fantastic observance Terry. What have the temperatures been averaging in your area the last 1-2 weeks? Have you had any nursery colonies in your bat houses or just bachelor?
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Terry Lobdell
Member
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Posted: Wed Mar 28th, 2007 02:46 am |
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Joe, just in the last week it has been getting up in the 50's. yesterday in the high 70's, humid with a fair amount of insects flying.....
We had snow cover until last week........I'm thinking that these 5 are mothers the way they were roosting tight together in a row. They were in the same house tonight also........I now have 2 big browns roosting separately in other houses as well.
Last year including pups, I estimate I had around 60 little browns and 40 big browns.
Each year my bats seem to trickle back a few at a time. I'm guessing by mid May they have all arrived. Joe, have you observed the same with your bats?
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Joe Spencer
Administrator
| Joined: | Mon Feb 11th, 2002 |
| Location: | Massachusetts USA |
| Posts: | 522 |
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Posted: Wed Mar 28th, 2007 08:05 pm |
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I haven't had as many bats as you. I've been getting first seasonal usage in mid to late april and sometimes as late as may. To date I have yet to have a nursery colony at my latest residence so I'm very interested in their behaviour. Your early occupancy or any for that matter coincides with females leaving hibernaculum a little earlier than males on average. Thanks for the feedback. 
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