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Planning > Bat Ecology > Flashcards

Bat Ecology Flashcards

1
Q

What does PEA stand for?

A

Preliminary Ecology Appraisal (for bats)

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2
Q

What is a suitability assessment based on?

A

Habitat features only - e.g. the presence of a roost would not automatically make the suitability class as ‘high’

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3
Q

What can potential suitability of a proposed development site for bats range from?

A

None, negligible, low, moderate, high

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4
Q

What are the tree suitability classifications called, and what do they mean?

A

“None” (either no PRFs or highly unlikely to be any); “FAR” (Further Assessment Required); PRF (a tree with at least one Potential Roost Feature)

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5
Q

What is an endoscope and what is it used for?

A

An endoscope is a long, thing tube with a small camera inside. Lightweight endoscopes are ideal for investigating burrows, nest sites etc

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6
Q

What does GLTA stand for?

A

Ground Level Tree Assessment

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7
Q

What does PRF stand for?

A

Potential Roost Feature

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8
Q

What are bat activity surveys?

A

Observation and acoustic (manual or static) surveys using bat detectors to establish species and measure bat activity

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9
Q

What does ALBST stand for?

A

Advanced Licence Bat Survey Techniques

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10
Q

Do you need to consider impacts on bats even when trees are retained?

A

Yes

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11
Q

What is a the typical bat survey process?

A
  1. Ground Level Assessment - PRFs not always visible from the ground so results at this stage are approximate; 2. Roost feature inspection surveys, to asses roosting resource; 3. activity surveys, to help understand what species are on site
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12
Q

What does NVA stand for?

A

Night Vision Aids

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13
Q

Are transect surveys manual or automatic?

A

Manual

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14
Q

What do automatic/static bat activity surveys involve?

A

Installing bat detectors at fixed locations to record bat activity remotely

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15
Q

How many UK bat species use trees for either foraging and/or roosting?

A

All of them

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16
Q

Talk through bat activities over the course of a year/bat calendar:

A

Over winter bats hibernate in caves, cellars etc. March: come out of hibernation, feed on warmer nights. April: Females move to maternity roosts. May: Ideal time to start surveys - pregnant females in maternity roosts. June/July: Bats have their young. August: Young start to fly and feed. September/October: mating and swarming. November: Start to go into hibernation

17
Q

What are day and night roosts?

A

Simply where bats go in the day and night, especially if they’re out foraging and the weather gets bad

18
Q

What is a feeding roost?

A

Where they go to feed. You may see butterfly, moth etc winds there (they eat insect bodies but not wings)

19
Q

What is a transitional roost?

A

Roosts that bats use between summer and hibernation roosts.

20
Q

What is a maternity roost?

A

Where bats go to breed

21
Q

What is a hibernation roost?

A

Where bats go in winter months to hibernate

22
Q

What is a satellite roost?

A

A roost that’s used in conjunction with a main bat roost (e.g. a maternity roost)

23
Q

What are the most important roost types?

A

Most important: maternity. Second most important: Hibernation

24
Q

What are some key reasons why bats leave roosts?

A

Disturbance (bats are very fussy e.g. if you take a tree away that provides shading to a roost then they may leave it); predators e.g. barn owls; infestation of an insect they don’t like e.g. hornets

25
Q

Do bats ever return to roosts once abandonded?

A

Yes, sometimes they do

26
Q

When are bat activity surveys undertaken?

A

Summer

27
Q

What are the main threats to bats?

A

Agricultural intensification, habitat loss and fragmentation, loss of roost sites from development etc, and climate change

28
Q

What is a bat roost? (general definition)

A

Any place that bats use to find refuge and/or shelter

29
Q

Do bats switch roosts?

A

Yes, some switch often - e.g. some use up to 60 roosts a year

30
Q

What order are bat tree surveys undertaken in, and when?

A

Walkover surveys to identify features are ideally undertaken first in winter. Climbing surveys for trees requiring work with PRFs identified may then be undertaken. Bat activity surveys should be undertaken in summer. June/July is a really good time to survey as bats should be back in their summer and maternity roosts

31
Q

Will ecologists look at buildings e.g. houses when surveying a rural site?

A

They may do - it’s worth checking with them and notifying the landowner(s) if they are

32
Q
A

Planning (8 decks)

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