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izw-berlin.de

https://izw-berlin.de· First analyzed 20 May 2026· Updated 20 May 2026
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izw-berlin.de
Desktop screenshot of izw-berlin.de
Mobile screenshot of izw-berlin.de
Mobile

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Hosting Provider

Mittwald CM Service GmbH und Co.KG

IP Address

178.16.59.54

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Espelkamp, Germany

ASN

AS15817

Organization

Mittwald CM Service GmbH und Co.KG

Server

Apache

Nameservers

deneb.dfn.de.a1.fv-berlin.de.a2.fv-berlin.de.

Performance

79

Core Web Vitals

Weight

First Contentful Paint
2.4 s10%
Speed Index
3.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.3 MB
40 requests

Image Optimization

WebPAVIFResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Mittwald CM Service GmbH und Co.KG

Technology Stack

6 Technologies Detected

Libraries

2
jQuery
jQuery UI

CSS Frameworks

1
Tailwind CSS

Analytics

1
Google Analytics

Tag Managers

1
Google Tag Manager

Web Servers

1
Apache

SEO Analysis

B72/100
21
8
1
Meta Tags10/15
Content11/12
Headings8/8
Technical23/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness2/4
Mobile1/4
Indexability3/3
I
izw-berlin.deizw-berlin.de

Home - Leibniz Institute for Zoo and Wildlife Research

No description available for this page.

Title Length54 chars

Recommended: 50-60 chars (~322px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing meta description — important for click-through rates in SERPs

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,533 URLs

robots.txt

4 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

23/100
Needs Work
8 10 1

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AI & LLM Readiness

D48/100
Bot Access
20/25
Machine Read.
12/25
Schema Data
1/25
Citation
15/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User
data-nosnippet

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
navheader/footer
Text ratio:17%
Words:2,291
Token eff.:Optimal
Sections/1K:4.8
Depth:2/5

Structured Data

12 JSON-LD
BreadcrumbList

Citation Readiness

Opening Summary139w
Descriptive Headingsavg 13.2w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (7)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
A
80/100
13
Passed
3
Critical
1
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
17/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
9/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
47/100
C
161 mg
CO₂e / view
1.3 MB
Page Weight
70%
Cleaner Than
New Visitor
184 mg
vs
Returning (cached)
92 mg
Annual (10K/mo)
19.3 kg
Emission Segments
Data Center
36 mg
Network
39 mg
Device
86 mg
Resource Breakdown
JavaScript
305.5 KB
Images
800.1 KB
CSS
180.7 KB
HTML
14.8 KB
Green Hosting Not Verified
Mittwald CM Service GmbH und Co.KG
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A+

Security Score

95%Excellent
Static / Informational

HTTPS

No WAF

80d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.05.2026

Valid Until

08.08.2026

Subject Alternative Names (1)

www.izw-berlin.de

SHA-256 Fingerprint

1A:C3:04:C4:4F:80:B2:78:2A:02:66:04:2E:4A:96:D4:5F:8B:EF:BA...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

age
657
cache-control
🟢 1 Month(max-age=2592000, public, s-maxage=1800)
contao-cache
fresh
content-encoding
📦 Gzip(gzip)
content-length
14821
content-type
text/html; charset=UTF-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

b1928.mx.srv.dfn.de
c1928.mx.srv.dfn.de
a1928.mx.srv.dfn.de

Domain Information

izw-berlin.de

Last Updated

19.06.2017

DNSSEC
Not Enabled

Privacy & Compliance

Usercentrics

Cookie Consent Banner
Usercentrics
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Usercentrics

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
C
62/100
Mobile Friendly1 breakpoint
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1.0, maximum-scale=5.0, user-scalable=1
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Oswald + Helvetica Neue

WCAG Partial
70/100
Readability
/30
21/30

16px · LH 1.50

Hierarchy
/20
13/20

1.75x ratio · ✓ H1→H6

WCAG
/25
18/25

4.28:1 min contrast

Performance
/25
18/25

System fonts

Heading Font

Oswald

Display28px

Body Font

Helvetica Neue

Sans16px

Contrast Ratio

4.28:1

1 issue

Reading Comfort

~38 CPL

Narrow lines
28px
h1
21px
h2
18px
h3
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 23/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 4.3:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

Buy on MyFontsFluid TypeFlesch 23

Color Palette

12 unique colors
2.49:1 Fail Light
#ffffff
Background· 38.5%
#a6a594
Secondary· 5%
#827f5d
Primary· 7%
#564c37
Secondary· 6.8%
#636247
Secondary· 6.7%
#e6e3df
Secondary· 6.5%
#7f6b4d
Secondary· 6%
#8e906b
Secondary· 5.4%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

11 Resources

9
Scripts
2
Styles
1
Async
0
Defer

Top Script Sources

local(6)app.eu.usercentrics.eu(2)sdp.eu.usercentrics.eu(1)

Website Identity

Lake Müggelsee in Berlin with the IGB research facility (photo by Angelina Tittmann/IGB)

ImageObject
direktor@izw-berlin.de
Location detected: 🇩🇪 Germanyvia tld
en

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Last analyzed: 20 May 2026 at 11:10

Historical Analysis & Change Tracking